fix: better config package to enhance test and restructuring

[profclems]

• use yaml for configuration instead of .env
• better config reading, caching and writing
• supports writing and reading local configs (configuration in working directory)
• supports reading and writing host-level configuration which over-rides global config but can be overridden by local configs
• preserves glabs's config read format (Environmental variables -> Local Config -> Global Config)
• supports writing an updated config, preserving comments
• supports mostly lazy evaluation of yaml

Related Issue

#170

Motivation and Context

This PR seeks to resolve #170 while making it easier to work on #157

How Has This Been Tested?

This has been manually tested by building and running the binary and I have added tests to cover my changes.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

TODO (Available for discussion)

• Migrate the old .env to config.yml
• Properly format old aliases.yml

[pull-assistant]

Best reviewed: commit by commit

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Optimal code review plan (1 warning)

fix: better config package

internal/config/config_new.go 40% changes removed in finalize config pack...

     fix: replace config.getRepo() with git.getRepo

     feat: add ability to set git protocol (#221)

     fix: replace config.getRepo() with git.getRepo

     Format code with gofmt

     Merge branch 'trunk' into fix-better-config

     Write aliases to file 🔥

     add local config support

     fix tests 🔨

     Format code with gofmt

     finalize config package

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[codecov]

Codecov Report

Merging #223 into trunk will increase coverage by 1.89%.
The diff coverage is 55.28%.

@@            Coverage Diff             @@
##            trunk     #223      +/-   ##
==========================================
+ Coverage   24.56%   26.46%   +1.89%     
==========================================
  Files          76       83       +7     
  Lines        3985     4206     +221     
==========================================
+ Hits          979     1113     +134     
- Misses       2928     2990      +62     
- Partials       78      103      +25     

Impacted Files	Coverage Δ
cmd/glab/main.go	36.66% <0.00%> (-19.79%)	⬇️
commands/pipeline_status.go	3.52% <0.00%> (-1.02%)	⬇️
commands/repo_archive.go	7.50% <0.00%> (-2.26%)	⬇️
internal/config/config_migration.go	0.00% <0.00%> (ø)
internal/config/config.go	31.75% <10.52%> (-20.38%)	⬇️
internal/config/local_config.go	18.42% <18.42%> (ø)
internal/config/config_file.go	32.55% <32.55%> (ø)
internal/config/alias_config.go	39.28% <39.28%> (ø)
internal/config/host_config.go	66.66% <66.66%> (ø)
internal/config/config_type.go	71.11% <71.11%> (ø)
... and 84 more

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