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/templates/home.html

@@ -0,0 +1,4 @@
+{{ define "content" }}
+<h1>Welcome to CRM</h1>
+<p>Manage your clients, customers, and scheduling.</p>
+{{ end }}