feat: add named parameter support to virtual tables

[Mause]

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (9af377a) 60.33% compared to head (588e4d4) 60.62%.

Files	Patch %	Lines
src/vtab/function.rs	92.30%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #250      +/-   ##
==========================================
+ Coverage   60.33%   60.62%   +0.29%     
==========================================
  Files          36       36              
  Lines        2115     2131      +16     
==========================================
+ Hits         1276     1292      +16     
  Misses        839      839              

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[Mytherin]

Thanks!