Parse line comments before statements

[kevinbarabash]

We need to support parsing comments (even if we just ignore them for now) so that we can support the examples on the demo page.

[codecov[bot]]

Codecov Report

Merging #684 (2a58f44) into main (557b558) will increase coverage by 0.02%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #684      +/-   ##
==========================================
+ Coverage   88.83%   88.86%   +0.02%     
==========================================
  Files         109      109              
  Lines       24126    24185      +59     
==========================================
+ Hits        21432    21491      +59     
  Misses       2694     2694              

Files Changed	Coverage Δ
crates/escalier_parser/src/token.rs	100.00% <ø> (ø)
crates/escalier_parser/src/expr_parser.rs	97.01% <100.00%> (+0.01%)	:arrow_up:
crates/escalier_parser/src/parser.rs	98.06% <100.00%> (+0.11%)	:arrow_up:
crates/escalier_parser/src/stmt_parser.rs	98.87% <100.00%> (+0.09%)	:arrow_up:

... and 6 files with indirect coverage changes