feat(gitea): add Gitea/Forgejo as a git provider

Full parity with the existing GitLab provider:
- Server module packages/web/server/lib/gitea (auth/client/repo/routes + docs + tests)
  with Gitea REST v1 API, PAT + base URL auth, multi-account storage
- Shared GiteaAPI types and web API client
- Provider detection generalized with user-configurable custom domains
  per provider (github/gitlab/gitea), additive with built-in defaults
  (github.com, gitlab.com) and connected-account hosts; precedence
  github -> gitlab -> gitea
- Gitea PR view, issues section, pickers, integration dialog, branch
  PR status helper, settings UI (PAT + base URL + custom domains)
- Magic prompts (gitea.pr.review, gitea.issue.review) and full 11-locale
  i18n parity

packages/web/src/api/index.ts

@@ -16,6 +16,7 @@ import { createWebToolsAPI } from './tools';
 import { createWebPushAPI } from './push';
 import { createWebGitHubAPI } from './github';
 import { createWebGitLabAPI } from './gitlab';
+import { createWebGiteaAPI } from './gitea';
 import { createWebClientAuthAPI } from './clientAuth';
 
 export interface WebAPIsOptions {
@@ -47,6 +48,7 @@ export const createWebAPIs = (options: WebAPIsOptions = {}): RuntimeAPIs => {
   notifications: createWebNotificationsAPI(),
   github: createWebGitHubAPI({ urls: activeUrls }),
   gitlab: createWebGitLabAPI({ urls: activeUrls }),
+  gitea: createWebGiteaAPI({ urls: activeUrls }),
   push: createWebPushAPI(),
   clientAuth: createWebClientAuthAPI(),
   tools: createWebToolsAPI(),