Add structured project tools with rich relationships

Replace chunk-based project tools with dedicated structured project
tools that store projects as single Qdrant points with rich JSON
payloads. Adds list_projects, get_project, upsert_project,
update_project, and delete_project tools with Zod discriminated
union validation for per-category relationship operations.

.gitignore

@@ -1 +1,4 @@
-node_modules/\ndist/\n*.js.map\n*.d.ts.map
+node_modules/
+dist/
+*.js.map
+*.d.ts.map