feat(tools): implement CRUD operations for thoughts and projects

* Add tools for creating, retrieving, updating, and deleting thoughts.
* Implement project management tools for creating and listing projects.
* Introduce linking functionality between thoughts.
* Add search and recall capabilities for thoughts based on semantic queries.
* Implement statistics and summarization tools for thought analysis.
* Create database migrations for thoughts, projects, and links.
* Add helper functions for UUID parsing and project resolution.

migrations/003_add_projects.sql

@@ -0,0 +1,13 @@
+create table if not exists projects (
+  id uuid default gen_random_uuid() primary key,
+  name text not null unique,
+  description text,
+  created_at timestamptz default now(),
+  last_active_at timestamptz default now()
+);
+
+alter table thoughts add column if not exists project_id uuid references projects(id);
+alter table thoughts add column if not exists archived_at timestamptz;
+
+create index if not exists thoughts_project_id_idx on thoughts (project_id);
+create index if not exists thoughts_archived_at_idx on thoughts (archived_at);