Update docs index, fix copyright dates, remove code of conduct

- Fix docs index to properly include README content by removing
  the end-before directive that was looking for a non-existent marker
- Update copyright to 2023-2026 in docs/conf.py and LICENSE
- Fix typo in LICENSE copyright date (was 2023-2014)
- Remove Code of Conduct files and docs reference

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: semenko

CODE_OF_CONDUCT.md

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright © 2023–2014 Nick Semenkovich \<[email protected]\>
+Copyright © 2023-2026 Nick Semenkovich <[email protected]>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

LICENSE

@@ -21,7 +21,7 @@
 # -- Project information -----------------------------------------------------
 
 project = "Bam2Tensor"
-copyright = "2023, Nick Semenkovich"
+copyright = "2023-2026, Nick Semenkovich"
 author = "Nick Semenkovich"
 
 # -- General configuration ---------------------------------------------------

docs/codeofconduct.md

@@ -1,7 +1,4 @@
 ```{include} ../README.md
----
-end-before: <!-- github-only -->
----
 ```
 
 [license]: license
@@ -16,7 +13,6 @@ maxdepth: 1
 
 reference
 contributing
-Code of Conduct <codeofconduct>
 License <license>
 Changelog <https://github.com/mcwdsi/bam2tensor/releases>
 ```