chore(libs): rename db_properties_notes to db_properties_guide and update README references

libs/README.md

@@ -16,9 +16,12 @@ Load `logseq` plugin sdk as global namespace
 import "@logseq/libs"
 ```
 
-#### APIs & Samples
+#### APIs & Samples & References
 - https://logseq.github.io/plugins/
 - https://github.com/logseq/logseq-plugin-samples
+- [The New DB properties developer guide - A](./development-notes/db_properties_guide.md)
+- [The New DB properties developer guide - B](./development-notes/db_properties_skill.md)
+- [Logseq Plugin Development Agents Guide](./development-notes/AGENTS.md)
 
 #### Community templates
 

libs/development-notes/db_properties_notes.md → libs/development-notes/db_properties_guide.md

@@ -1,4 +1,4 @@
-# Logseq DB Properties (Developer Notes)
+# Logseq DB Properties (Developer Guide)
 
 This note explains how **properties** work in Logseq when using a **DB graph** (database mode), how that differs from a **file graph** (Markdown/Org), and how to use the **plugin SDK** APIs defined in `libs/src/LSPlugin.ts`.