[DEV] Refactor entrypoint file

[jmbannon]

No description provided.

[codecov]

Codecov Report

Merging #765 (401b315) into master (4105c2e) will increase coverage by 0.07%.
Report is 1 commits behind head on master.
The diff coverage is 97.67%.

@@            Coverage Diff             @@
##           master     #765      +/-   ##
==========================================
+ Coverage   96.77%   96.84%   +0.07%     
==========================================
  Files          70       72       +2     
  Lines        4898     4915      +17     
==========================================
+ Hits         4740     4760      +20     
+ Misses        158      155       -3     

Files	Coverage Δ
src/ytdl_sub/cli/entrypoint.py	97.02% <100.00%> (ø)
src/ytdl_sub/cli/output_summary.py	100.00% <100.00%> (ø)
src/ytdl_sub/cli/parsers/dl.py	100.00% <100.00%> (ø)
src/ytdl_sub/cli/parsers/main.py	100.00% <ø> (ø)
src/ytdl_sub/main.py	94.44% <100.00%> (ø)
src/ytdl_sub/cli/output_transaction_log.py	92.59% <92.59%> (ø)

... and 1 file with indirect coverage changes