refactor: remove exports from package.json and adjust imports

[06kellyjac]

Exports makes it hard to access other paths in the project
Until we arrive on stable interfaces to access other parts of git-proxy
removing exports would be helpful.
Import paths have been adjusted slightly for plugins and the docs for
plugins due to the exports aliases being a bit different.

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[JamieSlome]

Seeing as we'd be breaking import statements, we'll make a minor bump to v1.6.0 if we proceed 👍

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.11%. Comparing base (dd5d692) to head (c5d200d).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #793   +/-   ##
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  Coverage   63.11%   63.11%           
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  Files          47       47           
  Lines        1678     1678           
=======================================
  Hits         1059     1059           
  Misses        619      619           

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[06kellyjac]

Running into some blockers due to the exports still which are quite painful.
The hope is to drop this for now until we have some stabilized interfaces.

This does break some import paths because the exports were slightly different to the actual file paths.
This change is pretty trivial to fix so I think we can take the hit without bumping major.
Docs have been updated to match.

[JamieSlome]

LGTM! 🍰

[coopernetes]

Agreed with the points raised here. exports can be re-introduced in a later release.

Need update the plugin docs as well once this is released.