feat(gitea): add domain model classes, helpers, and refactor GiteaClient internals; expand README with usage and docs

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@apiclient.xyz/gitea',
-  version: '1.4.0',
+  version: '1.5.0',
   description: 'A TypeScript client for the Gitea API, providing easy access to repositories, organizations, secrets, and action runs.'
 }