Skill-Namensfamilien: weekly-review -> gtd-weekly-review, dritte Person in allen Descriptions (#129)

Files changed:
- AGENTS.md
- CHANGES.md
- INSTALL.md
- README.md
- VERSION
- instructions/CONTRACT.md
- instructions/dev/stack-close/SKILL.md
- instructions/dev/stack-dev/SKILL.md
- instructions/gtd-weekly-review/SKILL.md
- instructions/setup-instance.md
- instructions/weekly-review/SKILL.md
- instructions/wiki-ingest/SKILL.md
- instructions/wiki-lint/SKILL.md
- instructions/wiki-manage/SKILL.md
- instructions/wiki-query/SKILL.md
- instructions/wiki-status/SKILL.md
- tools/chemenu/tests/test_instructions_cmd.py

instructions/setup-instance.md

@@ -303,7 +303,7 @@ and ready for its first ingest.
 
 16. **Restart the agent session.** Harnesses read the skill directories at startup; only
     afterwards are `wiki-ingest`, `wiki-query`, `wiki-manage`, `wiki-lint`, `wiki-status` and
-    `weekly-review` available.
+    `gtd-weekly-review` available.
 
 ## Scope