Add file path support to autocomplete

[isaactodo]

Closes #105

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...seedu/address/logic/parser/AutocompleteParser.java	89.47%	0 Missing and 2 partials :warning:

Files with missing lines	Coverage Δ	Complexity Δ
...seedu/address/logic/parser/AutocompleteParser.java	91.75% <89.47%> (+8.62%)	44.00 <8.00> (+9.00)