docs(thirdweb): collapse seven thirdweb pages into one tool page at parity (#2255)

[GigaHierz]

Closes the code half of #2255.

What changed

thirdweb was documented across seven pages — three under Dev Environments (overview, thirdweb, one-click-deploy), an SDK page under Libraries & SDKs, and three orphaned pages under build-on-celo/build-with-thirdweb/ — with tutorials, step-by-step code, and wording no other tool gets ("Using Thirdweb is recommended because…", "Complete Web3 development framework with powerful wallet tools", "Recommended: Use affordable indexers like thirdweb Insight").

It is now one page: tooling/dev-environments/thirdweb, flat alongside foundry.mdx, hardhat.mdx and remix.mdx, same title pattern ("Deploy on Celo with thirdweb" / sidebar "Using thirdweb"). It carries only what these docs actually own — the Celo chain configuration — and points at thirdweb's own docs for the rest.

Resolving the ticket's OPEN question

OPEN: home it under dev-environments or under SDKs; pick one and apply the same choice to the redirects

Dev Environments. Foundry, Hardhat and Remix are single flat .mdx files in that group; a single page in its own folder next to them would not match. All seven old paths redirect to the one page.

De-promotion pass on the remaining mentions

Page	Change
tooling/wallets/index.mdx	Kept as a plain list item at parity with the other 10 providers; utm_source=celo&utm_medium=documentation&utm_campaign=chain_docs dropped (no other provider carries campaign parameters)
build-on-celo/build-with-ai/x402.mdx	"Alternative: thirdweb facilitator" → "Other facilitators", one sentence and one link; the duplicate Playground row dropped from Resources
build-on-celo/scaling-your-app.mdx	Indexer section no longer recommends a vendor; points at /tooling/indexers/overview
tooling/libraries-sdks/web3/index.mdx	"Please consider using thirdweb or viem" → "Use viem instead"
tooling/nodes/overview.mdx	Neutral one-line blurb, utm parameters dropped
build-on-celo/quickstart.mdx	"Complete Web3 development framework with powerful wallet tools" → "Wallet connector from thirdweb"

Two unrelated bugs fixed while in these files

• build-on-celo/attribution-tags.mdx:64 linked wagmi to /tooling/dev-environments/thirdweb/overview. Now points at wagmi.sh.
• tooling/overview/index.mdx and tooling/dev-environments/index.mdx both listed /developer/deploy/* (stale redirect sources) and omitted Foundry. Both lists are now current root-relative paths, alphabetical, with Foundry added.

Three now-unreferenced images deleted (img/thirdweb.svg, img/thirdweb-explore.png, img/building/how-to-deploy/thirdweb/thirdweb-explore.png) — grep across *.mdx, *.json and *.jsx shows no remaining references.

On the redirect chain

The ticket flagged a chain at docs.json:1468 → /build/build-with-thirdweb/celo-nft-drop-tutorial, itself a redirect source. That dead end was already pruned by #2279. Verified on this branch — no thirdweb redirect resolves to another redirect source:

python3 -c "
import json;d=json.load(open('docs.json'))
srcs={r['source'] for r in d['redirects']}
print([r for r in d['redirects'] if 'thirdweb' in r['source']+r['destination'] and r['destination'] in srcs])
"
# []

Verification

$ npx mintlify broken-links
success no broken links found

$ bash scripts/check-orphans.sh
Found 20 orphan page(s) …

20, down from 23 — the three thirdweb orphans are gone. The remaining 20 are #2253's, and #2253 stacks on this branch so the orphan check can flip from report-only to gating in one step.

Not in this PR

The ops half of #2255 is untouched and the issue should stay open for it: the usage audit of which ecosystem projects still rely on thirdweb, notifying the top projects, and planning the vendor move. Nothing in this repo can answer that.

The thirdweb title pair from #2241 is resolved as a side effect — the colliding "Overview"/"Getting Started with Thirdweb" pages no longer exist.

[palango]

Ran the checks myself on this branch and they match the PR body: broken-links is green, the orphan count is down to 20 with the three thirdweb ones gone. All seven old paths reach the new page in one hop, and nothing in mdx/jsx still points at the deleted pages or images.

1. The Celo Sepolia claim in the new page is wrong. tooling/dev-environments/thirdweb.mdx:13 says there's no named export for Celo Sepolia, but thirdweb@5.121.1 exports celoSepoliaTestnet from thirdweb/chains, chain ID 11142220. defineChain(11142220) does work, so nothing is broken today, but this page's whole job is the Celo chain config:

   import { celo, celoSepoliaTestnet } from "thirdweb/chains";

2. Add a redirect for /tooling/libraries-sdks/thirdweb-sdk/index. Mintlify served the deleted page at that path too, and right now only the bare path is covered, so the /index variant will 404. docs.json already has 29 /index sources for this case.

3. Not from this PR, no need to fix here: the mdx-code-block fence at tooling/dev-environments/index.mdx:29 is a Docusaurus/Crowdin leftover that Mintlify renders as a literal code block. You're editing right below it anyway, so feel free to drop the fence, or leave it for a cleanup pass.

[GigaHierz]

All three addressed in 6c3fb63e.

1. The Celo Sepolia claim was wrong. Confirmed against the published package rather than taking it on trust:

$ npm view thirdweb version
5.121.1
$ cat package/dist/esm/chains/chain-definitions/celo-sepolia-testnet.js
export const celoSepoliaTestnet = defineChain({
  id: 11142220,
  name: "Celo Sepolia Testnet",
  nativeCurrency: { decimals: 18, name: "CELO", symbol: "CELO-S" },
  blockExplorers: [{ name: "Celo Sepolia Explorer", url: "https://celo-sepolia.blockscout.com/" }],
  testnet: true,
});

dist/types/exports/chains.d.ts:24 re-exports it. The block now uses the named export for both networks and drops defineChain entirely — which also makes the snippet shorter, since the whole point of the page is the chain config.

2. /index redirect added. You are right that only the bare path was covered; the /index variant would have 404d. Added directly below the bare source.

3. Fence dropped. Removed the mdx-code-block fence and the Crowdin comment above it — the paragraph is plain prose now.

mintlify broken-links is still green and the orphan count is unchanged at 20.