Add code editor setting dropdowns (#36534)

Adds three `<select>` controls on top right for indent style, indent
size, and line wrap to the code editor (`_edit`), diff patch editor
(`_diffpatch`) and git hook editor (`/settings/hooks/git/pre-receive`).

The git hooks editor is restyled to wrap the content in a box. Also
included is a bugfix for the git hooks editor where monaco was not
initialized correctly.

---------

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/repo/editor_apply_patch.go

@@ -20,6 +20,7 @@ func NewDiffPatch(ctx *context.Context) {
 	}
 
 	ctx.Data["PageIsPatch"] = true
+	ctx.Data["CodeEditorConfig"] = CodeEditorConfig{} // not really editing a file, so no need to fill in the config
 	ctx.HTML(http.StatusOK, tplPatchFile)
 }