docs(examples): stop READMEs saying smoke skips the flag CI runs as the falsifier

[TMHSDigital]

Closes #359.

Problem

Since falsifiers started running in CI (#320), 57 example READMEs still said "Smoke does not pass --x" for the very flag tests/smoke/catalog.json runs as that example's falsifier. bmesh-gear, the anatomy file every new example copies, was one of them.

Change

• 54 READMEs were rewritten by a script, plus 2 by hand (gn-modifier-inputs, sky-texture-sun-elevation); gn-bundle-roundtrip was already fixed in fix(examples): give gn-bundle-roundtrip a falsifier that can fail #408. The line now:

  • names only the flags smoke really skips;
  • appends Its catalog falsifier is --x (expects exit N).;
  • adds "5.2+ only; SKIP on older Blender" when the falsifier carries min_version.

  This matches the four READMEs that were already correct.

• tests/check_smoke_catalog.py: a new check_readme_claims() fails when a README's "does not pass" clause names its own row's falsifier flag. Validate already runs this script.

Example:

-Smoke does not pass `--output` or `--no-extrude`.
+Smoke does not pass `--output`. Its catalog falsifier is `--no-extrude` (expects exit 3).

Evidence (local, Python 3.13; no Blender needed)

• The scan behind examples: 60 of 64 READMEs say smoke 'does not pass' the flag CI actually runs as the falsifier #359 reported 57 contradictions. After this change it reports 0.
• Falsified: before fix(examples): give gn-bundle-roundtrip a falsifier that can fail #408 was merged (with the stale gn-bundle-roundtrip line still on this branch), the new check printed ::error::examples/gn-bundle-roundtrip/README.md: says smoke does not pass --legacy-rna, but it is this row's catalog falsifier and exited 1. After rebasing onto main, it passes.
• check_exit_code_readme.py passes.
• Each expected exit in the new text is copied from the catalog row by the script, not typed by hand.

🤖 Generated with Claude Code

[TMHSDigital]

CI evidence before merge: all checks pass ( 13 pass ). Blender Smoke on PR head: Blender 5.2.2 LTS / Blender 4.5.14 LTS. Summaries (happy path; falsifiers) per leg: 143 passed, 1 skipped, 0 failed;142 passed, 0 skipped, 0 failed;141 passed, 3 skipped, 0 failed;136 passed, 6 skipped, 0 failed;