chore(docs): normalise licensing and consolidate health files

Wave 1 of the documentation standardisation rollout. Mechanical only --
no prose was rewritten, and no file outside the set below was touched.

- Licence body and copyright line normalised to the canonical text in
  willtheorangeguy/.github/licenses, replacing 28 divergent variants.
  Repositories deliberately on GPL-3.0, Apache-2.0, BSD-2 or an upstream
  copyright were left alone.
- Extensionless LICENSE renamed to LICENSE.md for a single convention.
- CONTENT_LICENSE.md added where a repository carries both code and
  content, so the two are licensed separately instead of one blanket
  grant covering material that was not ours to license.
- Duplicated CODE_OF_CONDUCT.md, CONTRIBUTING.md and SECURITY.md removed
  from public repositories, which inherit them from the org-level
  .github repository. Private repositories keep their own copies, since
  org defaults do not reach them.
- README links to those files rewritten to absolute .github URLs in the
  same commit as the deletion, so no link is ever left dangling.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TtaJBmFDK3GcSyuhSuZ84R

Author: willtheorangeguy

CODE_OF_CONDUCT.md

@@ -2,8 +2,8 @@
 
 Copyright © 2026 willtheorangeguy
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

CONTRIBUTING.md

@@ -143,7 +143,7 @@ Tests are automatically run on GitHub Actions for every push and pull request ac
 
 Please contribute using [GitHub Flow](https://guides.github.com/introduction/flow). Create a branch, add commits, and [open a pull request](https://github.com/willtheorangeguy/ProgramVer/compare).
 
-Please read [`CONTRIBUTING`](CONTRIBUTING.md) for details on our [`CODE OF CONDUCT`](CODE_OF_CONDUCT.md), and the process for submitting pull requests to us.
+Please read [`CONTRIBUTING`](https://github.com/willtheorangeguy/.github/blob/main/CONTRIBUTING.md) for details on our [`CODE OF CONDUCT`](https://github.com/willtheorangeguy/.github/blob/main/CODE_OF_CONDUCT.md), and the process for submitting pull requests to us.
 
 ## Changelog