feat(run): search the console output (#528)

The Run console had no search, so finding a line meant scrolling long output by hand.

Cmd/Ctrl+F, a toolbar button and the context menu open a find bar over the whole buffer with match case, words and regex, a match counter, next and previous navigation, and highlighting that keeps output colours. It expands a fold hiding the current match, and works for test output and stack trace consoles too.

Co-authored-by: itning <[email protected]>

src/platform/locales/text/zh.json

@@ -799,6 +799,7 @@
   "Find in Files…": "在文件中查找…",
   "Find in Folder…": "在文件夹中查找…",
   "Find in Terminal": "在终端中查找",
+  "Find in console": "在控制台中查找",
   "Find in file": "在文件中查找",
   "Find in terminal": "在终端中查找",
   "Find results": "查找结果",