feat: manage contacts

- New permission `contacts:manage`
- Views for contact list and single contact view.
- Ability to block contacts that in inturn stops new messages from the contact.
- Make all DB transactions that run dynamically generated SQL query `readonly`
- Rename `/admin/teams/users` to `/admin/users/agents/` for consistency. (ref #50)
- Fix UI glitches for long emails (refs #54)
- Fix empty created_at date for agents admin table (refs #51)
- Migrations for v0.6.0

internal/migrations/v0.6.0.go

@@ -64,5 +64,16 @@ func V0_6_0(db *sqlx.DB, fs stuffbin.FileSystem, ko *koanf.Koanf) error {
 	if err != nil {
 		return err
 	}
+
+	// Add `contacts:manage` permission to Admin role
+	_, err = db.Exec(`
+		UPDATE roles 
+		SET permissions = array_append(permissions, 'contacts:manage')
+		WHERE name = 'Admin' AND NOT ('contacts:manage' = ANY(permissions));
+	`)
+	if err != nil {
+		return err
+	}
+
 	return nil
 }