docs(quick_start): split Configuration Setup into rotate, set type, and a reference

[brickbots]

Quick Start step 4 covered five topics in one continuous passage. This splits it into the three-part shape #648 asks for, without moving or renaming the section itself.

New structure

Configuration Setup (unchanged, still --underlined) now contains three ^-underlined sub-sections, matching the heading ladder the page already uses under "First Time Out":

• Rotating the Body — the rev4_convert.gif, the spring-loaded detents, and a pointer to the reference below for readers who don't yet know which position they want.
• Setting the PiFinder Type — why the software needs to know, the prose menu chain ("From the main menu, select Settings, scroll down to Advanced, then select PiFinder Type"), and the three existing screenshots.
• PiFinder Type Entries — a short reference: Rev4 Left / Right / Straight, the Straight-vs-rotate guidance, AS Bloom / AS Heart, and the existing v3 / v2.5 .. note::.

A short paragraph stays directly under the section heading to frame it as two steps.

Cross-references

Inbound :ref:s to quick_start:configuration setup still resolve. The heading text and its level are unchanged, so the label is untouched. Verified in the built HTML that all four still point at a real #configuration-setup anchor:

• docs/source/troubleshooting.rst:216
• docs/source/troubleshooting.rst:311
• docs/source/software.rst:72
• docs/source/quick_start.rst:280 (the Mounting note, in-page)

The three new sub-sections add quick_start:rotating the body, quick_start:setting the pifinder type and quick_start:pifinder type entries. None collides with an existing heading on the page.

Facts checked against the code

Verified the option list and its on-device labels in python/PiFinder/ui/menu_structure.py. Two corrections to the previous prose:

• It said "The rev4 entries sit at the bottom of the list. Three of them name the position...", implying there are more than three. There are exactly three: Rev4 Left, Rev4 Right, Rev4 Straight.
• The note said "The entries above these are the v3 and v2.5 configurations." The entries immediately above the rev4 group are AS Bloom and AS Heart. The v3 / v2.5 configurations are the five at the top of the list (Left, Right, Straight, Flat v3, Flat v2), which is how the note now reads.

Also added a sentence about the "Options for DIY PiFinders" message that Advanced shows for two seconds on open (callbacks.show_advanced_message). A ready-built owner following this route hits it and can read it as a wrong turn, which is close to the Discord report in the issue.

No screenshots were re-taken. The three existing images are already at the rev4 352x352 size and still show the right screens.

Verification

python -m sphinx -b html -n -q source /tmp/sphinx_648 prints nothing (exit 0). The added lines contain no em-dashes or semicolons, and match the page's one-space-after-full-stop convention.

Closes #648

🤖 Generated with Claude Code

[brickbots]

Follow-up commit 21d365b3 adds the missing middle screenshot.

The three images for "select Settings, scroll down to Advanced, then select PiFinder Type" skipped a step: settings_select.png shows the main menu and settings_menu_config.png is already titled Advanced, so nothing showed Advanced highlighted within Settings — the step the Discord report lost. It sits below the fold and takes six DOWN presses to reach.

settings_advanced_select.png captured at rev4 176×176 with the battery monitor on so the title bar matches its neighbours, then run through screenshot_to_doc.py (352×352, house amber tint). The images now map one-to-one onto the three steps of the prose chain.