feat: generate the gt command reference from gitea/cli

update_cli_docs.sh runs gt's own generator and lays the pages out for the
site: one directory per command group, front matter, titles, sidebar
order, fenced help text and rewritten links. --released succeeds while no
series is documented. A weekly workflow proposes updates like the runner's.

Signed-off-by: bircni <[email protected]>

cli-docs/reference/repo/sync.md

@@ -0,0 +1,67 @@
+---
+sidebar_position: 12
+description: "Sync a branch with its remote or its fork's parent"
+---
+
+# gt repo sync
+
+<!-- Generated by update_cli_docs.sh from the gitea/cli sources, do not edit. -->
+
+Sync a branch with its remote or its fork's parent
+
+## Synopsis
+
+```text
+Fast-forward a local branch (default: the repository's default branch) to the same branch on
+the repository's Git remote, without switching branches. Diverged branches are left unchanged.
+
+Given a repository without a Git remote here, sync updates it on the server instead: a fork
+fast-forwards to its parent, and a pull mirror fetches its source. Gitea updates a mirror as a
+whole and in the background, so --branch is refused for a mirror, and the JSON result names
+only the source, as remote.
+```
+
+```
+gt repo sync [<repository>] [flags]
+```
+
+## Examples
+
+```
+# Fast-forward the default branch from the repository's remote
+$ gt repo sync
+
+# Fast-forward another branch
+$ gt repo sync --branch release/1.0
+
+# Update a fork on the server from its parent
+$ gt repo sync bob/project
+```
+
+## Options
+
+```
+  -b, --branch string   Branch to sync (default: the repository's default branch)
+  -h, --help            help for sync
+```
+
+## Options inherited from parent commands
+
+```
+      --cwd directory       Working directory for repository discovery
+      --debug               Log the method, URL, status, and duration of each HTTP request to stderr
+      --host URL            Gitea instance URL, including any base path
+      --interactive         Allow prompts with machine output
+  -q, --jq expression       Filter JSON output using a jq expression; implies --json
+      --json fields[="*"]   Output JSON with the specified comma-separated fields, or all fields
+      --no-input            Disable prompts and implicit editor/browser interactions
+      --remote remote       Git remote used for repository discovery
+  -R, --repo OWNER/REPO     Select a repository as OWNER/REPO or URL
+      --sudo user           Perform API requests as this user (requires an administrator account)
+      --user name           Account name on the selected instance
+  -y, --yes                 Accept confirmations without prompting
+```
+
+## SEE ALSO
+
+* [gt repo](../repo/index.md): Work with Gitea repositories