Improve @ file search autocomplete to prioritize filenames

[sehoon38]

Is your feature request related to a problem? Please describe.
Currently, searching for a file with @ (e.g. @hooks) using the fuzzy searcher prioritizes files with matching directory structures rather than matching the actual filename. For instance, src/abcdefg.tsx matches sr with the same score as asafsafasf/asf/srccer.tsx.

Describe the solution you'd like
Configure AsyncFzf to prioritize matches closer to the end of a path (the filename) and to break ties by choosing the shortest overall path.

Describe alternatives you've considered
N/A

Additional context
N/A