feat(registry): support exclude_paths on git sources

[moshest]

Why

exclude_paths was declared only on ZipSourceSchema, and both excludePaths call sites in build.ts sat inside source.type === "zip" branches. Git sources had no way to prune a subtree, so the only lever was narrowing docs_path — which fails when the content you want shares a directory with content you don't.

I found this the hard way: I suggested exclude_paths to the contributor on #133, having generalised from registry/java/java.yaml without noticing it's a zip source. They had already ruled it out in their PR description, correctly. This makes the advice true rather than leaving it wrong.

#133 is a good illustration of the gap. godot-docs keeps GDScript, C# and C++ tutorials as siblings under tutorials/scripting. C# is 40% of that subtree and outranks GDScript on the queries that matter — signal, await, export — so a GDScript package built from the wider path returns C# results. Without exclude_paths the only option is a narrow docs_path that also drops the built-in function reference.

What changed

• exclude_paths added to GitSourceSchema, same shape and semantics as the zip one.
• compileGlob moved from zip.ts into a new glob.ts and shared rather than copied, alongside a new excludeFiles helper.
• Both git build paths — versioned (buildFromGit) and unversioned — filter through it.
• Documented in registry/README.md, written before the code per the DX-first rule in CLAUDE.md.

Patterns match relative to docs_path, exactly as they already do for zip sources, so a definition reads the same whichever source type it uses. The zip builder strips the prefix while extracting; git file paths still carry it, which excludeFiles accounts for.

Filtering runs before the existing emptiness check, so an over-broad pattern fails the build rather than publishing an empty package.

Verification

Against real godot-docs clones, not just unit tests:

definition	exclude_paths	sections	tokens
baseline	none	129	60,921
same, two files pruned	gdscript_styleguide.rst, static_typing.rst	103	46,911
same, everything pruned	**	—	exits 1

The third row is the one worth having: No documentation files found in https://github.com/godotengine/godot-docs (default branch), exit 1 — not a silent empty package. The second row also confirms the docs_path-relative semantics, since bare filenames matched without the tutorials/scripting/gdscript/ prefix.

• 5 new unit tests in glob.test.ts covering ** vs *, docs_path-relative matching, excluding everything, and literal metacharacters
• pnpm lint — clean (needed pnpm fix for import order and wrapping)
• pnpm build — clean
• pnpm test — 221 context + 48 registry, all passing
• Changeset added; zip.ts behaviour unchanged, covered by its existing tests

Not included

I haven't touched #133's definitions. Whether godot should exclude the gdscript tutorials is the author's call, and this only makes the option available.

🤖 Generated with Claude Code

https://claude.ai/code/session_01NBQQpA86yYzwJUiVz8ph2R

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