feat: add support for coder_git_auth data source (#6334)

* Add git auth providers schema

* Pipe git auth providers to the schema

* Add git auth providers to the API

* Add gitauth endpoint to query authenticated state

* Add endpoint to query git state

* Use BroadcastChannel to automatically authenticate with Git

* Add error validation for submitting the create workspace form

* Fix panic on template dry-run

* Add tests for the template version Git auth endpoint

* Show error if no gitauth is configured

* Add gitauth to cliui

* Fix unused method receiver

* Fix linting errors

* Fix dbauthz querier test

* Fix make gen

* Add JavaScript test for git auth

* Fix bad error message

* Fix provisionerd test race

See https://github.com/coder/coder/actions/runs/4277960646/jobs/7447232814

* Fix requested changes

* Add comment to CreateWorkspacePageView

codersdk/workspaceagents.go

@@ -291,12 +291,26 @@ func (c *Client) WorkspaceAgentListeningPorts(ctx context.Context, agentID uuid.
 
 // GitProvider is a constant that represents the
 // type of providers that are supported within Coder.
-// @typescript-ignore GitProvider
 type GitProvider string
 
+func (g GitProvider) Pretty() string {
+	switch g {
+	case GitProviderAzureDevops:
+		return "Azure DevOps"
+	case GitProviderGitHub:
+		return "GitHub"
+	case GitProviderGitLab:
+		return "GitLab"
+	case GitProviderBitBucket:
+		return "Bitbucket"
+	default:
+		return string(g)
+	}
+}
+
 const (
-	GitProviderAzureDevops = "azure-devops"
-	GitProviderGitHub      = "github"
-	GitProviderGitLab      = "gitlab"
-	GitProviderBitBucket   = "bitbucket"
+	GitProviderAzureDevops GitProvider = "azure-devops"
+	GitProviderGitHub      GitProvider = "github"
+	GitProviderGitLab      GitProvider = "gitlab"
+	GitProviderBitBucket   GitProvider = "bitbucket"
 )