Add GOTH stack CRM platform skeleton

- Go module with chi router, bcrypt
- SQLite schema for 9 tables
- Auth, Clients, Customers, Services, Scheduling, Payments, Q&A handlers
- HTMX template layouts

apps/go-crm/internal/handlers/setup.go

@@ -0,0 +1,14 @@
+package handlers
+
+import (
+	"database/sql"
+	"time"
+)
+
+func SetupHandlers(db *sql.DB) {
+	DB = db
+}
+
+func getCurrentTimestamp() int64 {
+	return time.Now().Unix()
+}