chore: mf-6793 remove EFP plugin

[swkatmask]

MF-6793 — Remove the EFP plugin

Jira: MF-6793

Removes the unmaintained Ethereum Follow Protocol plugin (packages/plugins/EFP), the exact inverse of the commit that added it (7f2af024ab).

Deleted

• packages/plugins/EFP/ — entire plugin directory (15 src/config files)
• packages/icons/plugins/EFP.svg — brand icon source

References removed (6 source/config files)

• packages/mask/shared/plugin-infra/register.js — @masknet/plugin-efp/register import
• packages/mask/package.json — @masknet/plugin-efp workspace dep
• packages/plugins/tsconfig.json — EFP project reference
• packages/shared-base/src/types/PluginID.ts — EFP = "xyz.ethfollow"
• security/content-security-policy.json — both EFP hosts (data.ethfollow.xyz + efp.app)
• cspell.json — efprpc, ethfollow

Regenerated

• packages/icons/icon-generated-as-jsx.js + icon-generated-as-url.js (via gulp icon-codegen)
• pnpm-lock.yaml (via pnpm install)

i18n catalogs

Marked the 9 EFP-specific strings obsolete (#~) in the 5 shared locale catalogs (en-US/ja-JP/ko-KR/zh-CN/zh-TW .po), matching the repo convention for removed strings. Compiled .json catalogs unchanged (lingui compile keeps obsolete entries, consistent with the existing obsolete set).

Verification

• tsc -b packages/plugins/tsconfig.json — clean
• eslint on edited source files — clean
• Negative grep for plugin-efp / PluginID.EFP / Icons.EFP / efp.app / ethfollow — no remaining references
• All 19 remaining plugin tsconfig.json references resolve