docs: initial external docs site

[jippi]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 89 lines in your changes are missing coverage. Please review.

Project coverage is 0.00%. Comparing base (c5094ff) to head (7c7d69d).

Files	Patch %	Lines
pkg/scm/gitlab/context_merge_request.go	0.00%	37 Missing ⚠️
pkg/scm/gitlab/client_actioner.go	0.00%	24 Missing ⚠️
pkg/stdlib/helpers.go	0.00%	11 Missing ⚠️
pkg/config/label.go	0.00%	6 Missing ⚠️
pkg/config/config.go	0.00%	4 Missing ⚠️
pkg/scm/gitlab/context.go	0.00%	3 Missing ⚠️
pkg/stdlib/functions.go	0.00%	3 Missing ⚠️
cmd/shared.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #16   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files         29      30    +1     
  Lines       1189    1271   +82     
=====================================
- Misses      1189    1271   +82     

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