Consolidate LLM reference files in llms directory

- Move glossary.md and vocabulary.md to llms/
- Rename README.md to reference.txt for LLM consistency
- Add fully-qualified links to glossary and vocabulary in llms.txt
- Update reference.txt with fully-qualified URLs

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

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

Author: richlander

llms.txt

@@ -1,7 +1,7 @@
 # .NET Release Metadata Graph
 > Machine-readable .NET release, CVE, and compatibility data for AI assistants.
 
-For extended reference with schema examples, see [llms/README.md](https://raw.githubusercontent.com/dotnet/core/refs/heads/release-index/llms/README.md).
+For extended reference with schema examples, see [llms/reference.txt](https://raw.githubusercontent.com/dotnet/core/refs/heads/release-index/llms/reference.txt).
 
 ## Rules
 
@@ -18,6 +18,11 @@ These are the **only** entry-point URLs you should call directly. All other URLs
 * **Releases Index (version-based entry):** https://raw.githubusercontent.com/dotnet/core/refs/heads/release-index/release-notes/index.json
 * **Timeline Index (time-based entry):** https://raw.githubusercontent.com/dotnet/core/refs/heads/release-index/release-notes/timeline/index.json
 
+Reference:
+
+* [Glossary](https://raw.githubusercontent.com/dotnet/core/refs/heads/release-index/llms/glossary.md) — release types, support phases
+* [Vocabulary](https://raw.githubusercontent.com/dotnet/core/refs/heads/release-index/llms/vocabulary.md) — all properties, link relations, enums
+
 ## Structure
 
 * Graph is a set of HAL+JSON indexes (follow `_links` to navigate)

release-notes/glossary.md llms/glossary.mdrelease-notes/glossary.md renamed to llms/glossary.md

@@ -13,6 +13,11 @@ For quick reference, see [llms.txt](https://raw.githubusercontent.com/dotnet/cor
 
 **CRITICAL**: Never construct URLs manually. Always follow `_links["..."].href` values from JSON responses.
 
+Reference:
+
+* [Glossary](https://raw.githubusercontent.com/dotnet/core/refs/heads/release-index/llms/glossary.md) — release types, support phases
+* [Vocabulary](https://raw.githubusercontent.com/dotnet/core/refs/heads/release-index/llms/vocabulary.md) — all properties, link relations, enums
+
 ## Common Workflows
 
 | Task | Path |