Instant search using NTFS journal

[yuyoyuppe]

Summary of the new feature/enhancement

#443 suggests a power-launcher with many useful features.
We could also integrate an instant system-wide search in it (like Everything), I.e. pressing a hotkey opens a single search inputbox and a table which shows results as you type.
There also could be a fast search API exposed, so the devs are encouraged to use it, since it's backed by Microsoft.

Proposed technical implementation details (optional)

Use DeviceIoControl with FSCTL_READ_USN_JOURNAL and cache the results in RAM (using in-memory DB).

[crutkas]

currently using indexer, results are pretty instant