WIP: AWS CodeCommit

[tony]

Fixes #440

AWS CodeCommit (HomePage, docs):

Via (page):

For example, to clone a repository named MyDemoRepo to a local repo named my-demo-repo:

git clone codecommit://MyDemoRepo my-demo-repo

To clone the same repository using a profile named CodeCommitProfile:

git clone codecommit://`CodeCommitProfile`@MyDemoRepo my-demo-repo

To clone a repository in a different AWS Region than the one configured in your profile, include the AWS Region name. For example:

git clone codecommit::ap-northeast-1://MyDemoRepo my-demo-repo

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 82.92683% with 7 lines in your changes missing coverage. Please review.

Project coverage is 62.84%. Comparing base (95d27a8) to head (46ba19a).

Files	Patch %	Lines
src/libvcs/url/git.py	77.27%	3 Missing and 2 partials :warning:
tests/url/test_git.py	89.47%	1 Missing and 1 partial :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #443      +/-   ##
==========================================
+ Coverage   62.68%   62.84%   +0.15%     
==========================================
  Files          40       40              
  Lines        3441     3480      +39     
  Branches      927      909      -18     
==========================================
+ Hits         2157     2187      +30     
- Misses        764      769       +5     
- Partials      520      524       +4     

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