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.

internal/tools/stats.go

@@ -0,0 +1,33 @@
+package tools
+
+import (
+	"context"
+
+	"github.com/modelcontextprotocol/go-sdk/mcp"
+
+	"git.warky.dev/wdevs/amcs/internal/store"
+	thoughttypes "git.warky.dev/wdevs/amcs/internal/types"
+)
+
+type StatsTool struct {
+	store *store.DB
+}
+
+type StatsInput struct{}
+
+type StatsOutput struct {
+	Stats thoughttypes.ThoughtStats `json:"stats"`
+}
+
+func NewStatsTool(db *store.DB) *StatsTool {
+	return &StatsTool{store: db}
+}
+
+func (t *StatsTool) Handle(ctx context.Context, _ *mcp.CallToolRequest, _ StatsInput) (*mcp.CallToolResult, StatsOutput, error) {
+	stats, err := t.store.Stats(ctx)
+	if err != nil {
+		return nil, StatsOutput{}, err
+	}
+
+	return nil, StatsOutput{Stats: stats}, nil
+}