feat(repo): validate create templates, publish local projects, verify edits

repo create --license NOPE returned Gitea's HTTP 500 internals. License,
.gitignore and label templates are now checked against the server's
lists, case-insensitively, and complete with Tab. --source DIR adds the
new repository as a remote of a local Git repository and --push pushes
its current branch; --public is the explicit opposite of --private, and
-d/-g/-l and the new alias follow gh. --trust-model now offers the names
Gitea accepts. A prompted name is confirmed with the visibility, owner
and host, and creation reports "✓ Created repository ..." and the URL.

repo edit --default-branch nope exited 0 without changing anything; the
branch must now exist. Edit gains --visibility, --enable-issues/-wiki/
-pull-requests/-projects, --allow-merge-commit/-squash/-rebase,
--delete-branch-on-merge, --default-merge-style and --add-topic/
--remove-topic, and reports which settings it changed.

repo migrate names the repository after the source URL, validates
--service before prompting, and reports the import with the URL.

Signed-off-by: bircni <bircni@icloud.com>

internal/services/repository_setup.go

@@ -45,6 +45,30 @@ func (s Repositories) Generate(ctx context.Context, source string, opts Reposito
 	return repositoryFrom(&response), nil
 }
 
+// Licenses lists the license templates that repository creation accepts.
+func (s Repositories) Licenses(ctx context.Context) ([]string, error) {
+	licenses, _, err := call(ctx, s.Client, func(ctx context.Context, c *gitea.Client) ([]*gitea.LicensesTemplateListEntry, *gitea.Response, error) {
+		return c.Templates.ListLicenses(ctx)
+	})
+	return convertAll(licenses, func(license *gitea.LicensesTemplateListEntry) string { return license.Key }), err
+}
+
+// Gitignores lists the .gitignore templates that repository creation accepts.
+func (s Repositories) Gitignores(ctx context.Context) ([]string, error) {
+	names, _, err := call(ctx, s.Client, func(ctx context.Context, c *gitea.Client) ([]string, *gitea.Response, error) {
+		return c.Templates.ListGitignores(ctx)
+	})
+	return names, err
+}
+
+// LabelTemplates lists the label sets that repository creation accepts.
+func (s Repositories) LabelTemplates(ctx context.Context) ([]string, error) {
+	names, _, err := call(ctx, s.Client, func(ctx context.Context, c *gitea.Client) ([]string, *gitea.Response, error) {
+		return c.Templates.ListLabels(ctx)
+	})
+	return names, err
+}
+
 // RepositoryMigrationOptions is explicit server-side import input. Credentials stay in request bodies.
 type RepositoryMigrationOptions struct {
 	Name           string        `json:"repo_name"`