feat: extend craft_application.git module

[dariuszd21]

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---

Add ability to manipulate repository and get additional data through GitRepo class:

• set_remote_url / set_remote_push_url alongside get counterparts (also set_no_push for disabling push for specific remotes)
• is_commit(), is_short_commit checkers
• use craft.git for subprocess git operation if available
• get_last_commit() to retrieve last commit on the current HEAD
• fetch() API to retrieve remote references

Linter issues fixed in #580

(CRAFT-3708)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.89%. Comparing base (0705676) to head (3b453f1).
Report is 317 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (0705676) and HEAD (3b453f1). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (0705676)	HEAD (3b453f1)
	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #576      +/-   ##
==========================================
- Coverage   99.28%   90.89%   -8.40%     
==========================================
  Files          29       64      +35     
  Lines        1265     3744    +2479     
  Branches      209      411     +202     
==========================================
+ Hits         1256     3403    +2147     
- Misses          6      273     +267     
- Partials        3       68      +65     

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[tigarmo]

@dariuszd21 can you point out the code that hasn't been reviewed yet?

[dariuszd21]

@dariuszd21 can you point out the code that hasn't been reviewed yet?

Sure, it will be all, but the first commit so:
get_last_commit() and get_last_commit_on_branch_or_tag() , changelog, integration tests for set_url and set_push_url, unit tests for fetch and few error cases for already tested APIs.
I'll mark snippets in the diff section

[dariuszd21]

I marked where is a code that wasn't already reviewed for clarity

[tigarmo]

thanks for pointing out the new changes!

[medubelko]

Some minor suggestions.

[dariuszd21]

Some minor suggestions.

Thank you, applied you suggestions !

[lengau]

Nice! Thank you!