Implemented the search feature

[lukeblevins]

For code review purposes. We implement search which allows for recursive queries inside any normal directory. We also aim to support hidden items with this PR.

Limitations: Only indexed locations are queried for performance reasons. We'll add a toggle to change this in a future PR

Fixes #333

[yaira2]

• We should hide and clear the text in the search box if it loses focus.
• The path bar should say "Search results in..."
• The status bar should display the correct item count
• The auto suggest boxes flyout should sort the results to find the 10 best matching items
• Switching the directory should clear the text in the search box
• The option to drag and drop should be disabled on the search results page
• The option to create new items should be disabled on the search results page
• The option to open the directory in terminal should be disabled on the search results page
• Localize all new strings
• Pressing the space bar in the search box when an item is selected will toggle QuickLook
• The copy location button should be disabled on the search results page
• Using the ctrl + r shortcut on the search results page clears the search results and shows the items that were in the searched directory

[d2dyno1]

Hmmm.. It seems like it does not display any search results for me no matter what I search for

Edit:
It looks like items.Count in SearchForUserQueryTextAsync() is 0 so the while loop is skipped

[yaira2]

@duke7553 Great work!