feat(go-crm): full auth, routing, middleware, and supporting infra

- Add auth handlers (signup, login, logout, account management) with bcrypt
- Add client, customer, service, scheduling, payment, question, answer handlers
- Add dashboard, monthly report, and lead pipeline pages
- Add UTF-8 middleware to force charset on HTML responses
- Add config package with env-based overrides for DB path, secrets, endpoints
- Add parser package for WhatsApp message ingestion
- Add clean-arch layers: pkg/domain, pkg/repo, pkg/usecase for leads
- Add cmd/migrate utility for DB migrations
- Add Makefile, README, run-tests.sh, and dev scripts
- Update docker-compose.yml with memory limits
- Update .air.toml to exclude DB files and stop on errors
- Update whatsapp-sync dependencies and add src/index.js entrypoint
- Add whatsme standalone WhatsApp reader app (source only)
- Untrack .opencode-sandbox/data/go-crm.db from git history
- Expand root .gitignore: ngrok, tmp dirs, sandbox DBs, compiled binaries

apps/whatsme/qr_render2.go

@@ -0,0 +1,23 @@
+//go:build ignore
+
+package main
+
+import (
+	"os"
+	"github.com/mdp/qrterminal/v3"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		println("usage: go run qr_render2.go <code>")
+		os.Exit(1)
+	}
+	config := qrterminal.Config{
+		Level:     qrterminal.M,
+		Writer:    os.Stdout,
+		BlackChar: "##",
+		WhiteChar: "  ",
+		QuietZone: 1,
+	}
+	qrterminal.GenerateWithConfig(os.Args[1], config)
+}