feat: Add template display name (backend) (#4966)

* Rename to nameValidator

* Refactor: NameValid

* Fix: comment

* Define new migration

* Include display_name

* Update typesGenerated.ts

* Update meta

* Adjust tests

* CLI tests

* Fix: audit

* Fix: omitempty

* site: display_name is optional

* unit: TestUsernameValid

* entities.ts: add display_name

* site: TemplateSettingsPage.test.tsx

* Fix: TemplateSettingsForm.tsx

* Adjust tests

* Add comment to display_name column

* Fix: rename

* Fix: make

* Loosen regexp

* Fix: err check

* Fix: template name length

* Allow for whitespaces

* Update migration number

coderd/userauth.go

@@ -261,7 +261,7 @@ func (api *API) userOIDC(rw http.ResponseWriter, r *http.Request) {
 	// The username is a required property in Coder. We make a best-effort
 	// attempt at using what the claims provide, but if that fails we will
 	// generate a random username.
-	usernameValid := httpapi.UsernameValid(username)
+	usernameValid := httpapi.NameValid(username)
 	if usernameValid != nil {
 		// If no username is provided, we can default to use the email address.
 		// This will be converted in the from function below, so it's safe