zinit: add page (#17182)

Co-authored-by: Managor <42655600+Managor@users.noreply.github.com>
Co-authored-by: Dylan <145150333+dmmqz@users.noreply.github.com>

pages/common/zinit.md

@@ -0,0 +1,28 @@
+# zinit
+
+> Flexible and blazing fast `zsh` plugin manager.
+> More information: <https://github.com/zdharma-continuum/zinit>.
+
+- Show all installed plugins:
+
+`zinit plugins`
+
+- Go to the directory of a plugin:
+
+`zinit cd {{repository_owner}}/{{repository_name}}`
+
+- Fetch the newest version of `zinit` from GitHub:
+
+`zinit self-update`
+
+- List status of all installed completions:
+
+`zinit completions`
+
+- Install completions for a plugin:
+
+`zinit creinstall {{repository_owner}}/{{repository_name}}`
+
+- Delete completion for a plugin:
+
+`zinit cuninstall {{repository_owner}}/{{repository_name}}`