feat!: support different repository providers

[dnldsht]

Introduced support for different git hosts and format references accordingly

Checking the specs for the repository field in package.json you can define different providers (github, gitlab, ...) so I've added the support for that and formatted the references (commit, pull-request, issue, compare) accordingly.

I've introduced a breaking change removing the github prop from the config, I can restore it and make it compatible with the new feature.

I'm really bad at naming :) I've used host I'm open for better name

I've also fixed 2 minor bugs:

• broken ungh link
• issue reference for github ssue -> issue

[dnldsht]

@pi0 any comment about the PR?

[pi0]

Hi dear @dnldsht sorry this was stalled. Do you mind to rebase your pull request?

[dnldsht]

Yess, I will sync my PR

@pi0 done

[codecov]

Codecov Report

Merging #55 (6907566) into main (e162ab8) will increase coverage by 3.23%.
The diff coverage is 100.00%.

❗ Current head 6907566 differs from pull request most recent head c7ff326. Consider uploading reports for the commit c7ff326 to get more accurate results

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
+ Coverage   80.84%   84.07%   +3.23%     
==========================================
  Files           5        6       +1     
  Lines         475      559      +84     
  Branches       64       80      +16     
==========================================
+ Hits          384      470      +86     
+ Misses         91       89       -2     

Impacted Files	Coverage Δ
src/config.ts	91.76% <100.00%> (-0.10%)	⬇️
src/index.ts	100.00% <100.00%> (ø)
src/markdown.ts	96.59% <100.00%> (+0.86%)	⬆️
src/repo.ts	100.00% <100.00%> (ø)

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[pi0]

Thanks!