Improve bash completions - Pass parsed command line to py-bash-commands

[daniel-shimon]

This PR passes the parsed command line (the real arguments and quotes to use).
Generally, the following scenarios functioned badly until now:

ls '/pro<TAB>
# ls /proc/

ls '/pro<TAB>'
# ls /proc/'

ls './spa<TAB>'
# ls './spaced dir''

ls './spa'<TAB>
# the bash completer won't work at all

ls './spaced d<TAB>
# the bash completer won't work

A matching PR is open at xonsh/py-bash-completion#19

For community

⬇️ Please click the 👍 reaction instead of leaving a +1 or 👍 comment

[codecov-io]

Codecov Report

Merging #4219 (e5b71d7) into main (5a792a6) will increase coverage by 0.03%.
The diff coverage is 95.45%.

@@            Coverage Diff             @@
##             main    #4219      +/-   ##
==========================================
+ Coverage   52.88%   52.91%   +0.03%     
==========================================
  Files         129      129              
  Lines       20006    20019      +13     
  Branches     3604     3608       +4     
==========================================
+ Hits        10581    10594      +13     
  Misses       8548     8548              
  Partials      877      877              

Impacted Files	Coverage Δ
xonsh/completers/bash.py	97.29% <95.00%> (-2.71%)	⬇️
xonsh/completers/bash_completion.py	30.25% <100.00%> (+0.51%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5a792a6...e5b71d7. Read the comment docs.

[gforsyth]

Great! Thanks for this @daniel-shimon !