Add keyboard shortcuts for repository file and code search (#36416)

Resolves #36417: Add GitHub-like keyboard shortcuts for repository
navigation:
- Press `T` to focus the "Go to file" search input
- Press `S` to focus the "Search code" input
- Press `Escape` to clear and unfocus search inputs

---------

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

templates/devtest/keyboard-shortcut.tmpl

@@ -0,0 +1,23 @@
+{{template "devtest/devtest-header"}}
+<div class="page-content devtest ui container">
+	<h1>Keyboard Shortcut</h1>
+
+	<div>
+		<div class="ui input global-shortcut-wrapper">
+			<input class="ui input" placeholder="Press S to focus">
+			<kbd data-global-init="onGlobalShortcut" data-shortcut-keys="s">S</kbd>
+		</div>
+	</div>
+
+	<div class="tw-mt-2">
+		<div class="ui action input">
+			<div class="ui input global-shortcut-wrapper">
+				<input class="ui input" placeholder="Press T to focus">
+				<kbd data-global-init="onGlobalShortcut" data-shortcut-keys="t">T</kbd>
+			</div>
+			<button class="ui button">Go</button>
+		</div>
+	</div>
+</div>
+
+{{template "devtest/devtest-footer"}}