feat(service): Add Google Chat Service

[EthanEFung]

Fixes issue #459

Description

Implements Google Chat Service integration.

Motivation and Context

This PR solves Issue #459

How Has This Been Tested?

Decent unit test coverage

gocov test | gocov report
ok      github.com/nikoksr/notify/service/googlechat    0.384s  coverage: 85.2% of statements

github.com/nikoksr/notify/service/googlechat/mock_create_call.go                 newMockCreateCall               100.00% (4/4)
github.com/nikoksr/notify/service/googlechat/mock_spaces_message_creator.go      newMockSpacesMessageCreator     100.00% (4/4)
github.com/nikoksr/notify/service/googlechat/mock_create_call.go                 @55:12                          100.00% (1/1)
github.com/nikoksr/notify/service/googlechat/mock_spaces_message_creator.go      @41:12                          100.00% (1/1)
github.com/nikoksr/notify/service/googlechat/googlechat.go                       Service.AddReceivers            100.00% (1/1)
github.com/nikoksr/notify/service/googlechat/googlechat.go                       Service.Send                    88.89% (8/9)
github.com/nikoksr/notify/service/googlechat/mock_spaces_message_creator.go      mockSpacesMessageCreator.Create 85.71% (6/7)
github.com/nikoksr/notify/service/googlechat/mock_create_call.go                 mockCreateCall.Do               81.25% (13/16)
github.com/nikoksr/notify/service/googlechat/googlechat.go                       newMessageCreator               80.00% (4/5)
github.com/nikoksr/notify/service/googlechat/googlechat.go                       New                             80.00% (4/5)
github.com/nikoksr/notify/service/googlechat/googlechat.go                       messageCreator.Create           0.00% (0/1)
github.com/nikoksr/notify/service/googlechat                                     ------------------------------- 85.19% (46/54)

Total Coverage: 85.19% (46/54)

Manual Testing

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)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

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

[codecov-commenter]

Codecov Report

Base: 75.39% // Head: 75.18% // Decreases project coverage by -0.21% ⚠️

Coverage data is based on head (0c0b66c) compared to base (c9c12d4).
Patch coverage: 72.22% of modified lines in pull request are covered.

❗ Current head 0c0b66c differs from pull request most recent head 24b75cf. Consider uploading reports for the commit 24b75cf to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #501      +/-   ##
==========================================
- Coverage   75.39%   75.18%   -0.21%     
==========================================
  Files          38       41       +3     
  Lines        1276     1366      +90     
==========================================
+ Hits          962     1027      +65     
- Misses        234      249      +15     
- Partials       80       90      +10     

Impacted Files	Coverage Δ
service/googlechat/mock_create_call.go	68.96% <68.96%> (ø)
service/googlechat/googlechat.go	70.45% <70.45%> (ø)
service/googlechat/mock_spaces_message_creator.go	82.35% <82.35%> (ø)

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[nikoksr]

@EthanEFung what an amazing PR! We appreciate it so much. Really, really high quality delivered from you here.

I just added some minor formatting/style changes, a missing comment or two, and one (I suppose) minor thing that needs our exchange. Other than that, there's basically nothing to do! Can't wait to get this merged into Notify.

[EthanEFung]

Hey @nikoksr I'm having some trouble trying to resolve my dependencies with the main branch. I've tried resolving the conflicts by editing the go.mod file directly and running go mod tidy, but whenever I run the tidy command, my changes to the mod file are removed. I've tried updating the oauth package using go get golang.org/x/oauth2 but this upgrades the package to v0.4.0. I've also tried targeting the v.0.0.0 but this didn't work either. Any advise you can give to point me in the right direction?

[nikoksr]

@EthanEFung sure thing! Should be resolved now. Could you please verify that everything's still working as intented? Tests and linter are happy.

[nikoksr]

Sweet, all looking good! Waiting for your confirmation that everything's still working as intended and we're ready to merge.

[EthanEFung]

@nikoksr Works well on my end

[nikoksr]

@EthanEFung alright, ready to merge. Thank you so much once again for your contribution, we really appreciate it.