gitea: add page (#17323)

Co-authored-by: Managor <42655600+Managor@users.noreply.github.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/gitea.md

@@ -0,0 +1,29 @@
+# gitea
+
+> Administer Gitea, a lightweight Git hosting server.
+> Requires a configured `app.ini` file or environment variables.
+> More information: <https://docs.gitea.com/administration/command-line>.
+
+- Run the Gitea web server using the default configuration:
+
+`gitea web`
+
+- Create the necessary database schema and tables:
+
+`gitea migrate`
+
+- Run administrative subcommands for user management or authentication management:
+
+`gitea admin {{user list}}`
+
+- Display help for a specific subcommand:
+
+`gitea {{admin}} --help`
+
+- Display help:
+
+`gitea help`
+
+- Display version:
+
+`gitea --version`