Search & Workspace UX improvements

[RTX-Skill]

Hi, little enhancements may help the experience.

1. Adds a small delay (configurable in settings) to the search, so when you type "hello" it doesn't search for "h", "he", "hel", etc. (optimize search)

2. Let us search in a specific JAR (ignoring imported libraries).

3. Let us remove a specific library / imported JAR (in case we imported the wrong one).

4. Let us add multiple JARs at once, or if we import a folder, allow removing individual files from it.

5. Fix the issue where the search window can't be minimized (it's kind of annoying).