refactor: write one contributing text for both pages

scripts/generate_site.py

@@ -3108,64 +3108,11 @@ def generate_cross_reference(
 
 
 def generate_contributing() -> str:
-    return """# Contributing - RetroBIOS
+    from generate_readme import contributing_text
 
-## Add a BIOS file
-
-1. Fork this repository
-2. Place the file in `bios/Manufacturer/Console/filename`
-3. Variants (alternate hashes for the same file): place in `bios/Manufacturer/Console/.variants/`
-4. Open a Pull Request - hashes are verified automatically and reported as a comment
-
-The [dump provenance](provenance.md) page lists catalogued dumps still missing
-from the collection, with their hashes. A file matching one of those is the
-most useful contribution.
-
-## Add a platform
-
-1. Create a scraper in `scripts/scraper/` (inherit `BaseScraper`)
-2. Read the platform's upstream source to determine how it checks BIOS files
-3. Add an entry to `platforms/_registry.yml`
-4. Generate the platform YAML config
-5. Test: `python scripts/verify.py --platform <name>`
-
-Full walkthrough: [adding a platform](wiki/adding-a-platform.md).
-
-## Add an emulator profile
-
-1. Clone the emulator's source code, upstream and libretro port
-2. Trace the file loading from the entry point, not from a keyword grep
-3. Document every file the code loads, with a `source_ref` line reference
-4. Write the YAML to `emulators/<name>.yml`
-5. Test: `python scripts/cross_reference.py --emulator <name>`
-
-Full walkthrough: [profiling guide](wiki/profiling.md).
-
-## File conventions
-
-- `bios/Manufacturer/Console/filename` for canonical files
-- `bios/Manufacturer/Console/.variants/filename.sha1prefix` for alternate versions
-- Files >50 MB go in GitHub release assets (`large-files` release)
-- RPG Maker and ScummVM directories are excluded from deduplication
-- Two paths differing only by case break clones on Windows and macOS;
-  `tests/test_no_case_collisions.py` enforces this
-
-## Before opening a PR
-
-```bash
-python -m unittest discover tests
-python scripts/pipeline.py --offline
-```
-
-## PR validation
-
-CI computes SHA1/MD5/CRC32 for every new file, checks them against the platform
-configs, validates the YAML against the schemas, runs the test suite, and posts
-a report on the PR.
-
-Contributors who add platform support are credited in the README, on this site,
-and in the BIOS packs.
-"""
+    return contributing_text(
+        lambda page: f"{page}.md", "# Contributing - RetroBIOS", "on this site"
+    )
 
 
 # Wiki pages