Minor fixes for webhooks package & project creation

[shydefoo]

Summary

• Add errors.go in webhook package to wrap all errors from the webhooks library as a WebhookError
• This is to enable better error handling, when users are creating or updating their projects when webhooks are enabled.
• Default numRetries set to 3, this prevents the frontend ui from timing out.
• The change in this MR will show this error if the ProjectCreatedEvent webhooks did not succeed:

* For updating projects, this error will appear:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.62%. Comparing base (8a02334) to head (7a09531).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #105      +/-   ##
==========================================
- Coverage   57.14%   56.62%   -0.52%     
==========================================
  Files          47       48       +1     
  Lines        2443     2467      +24     
==========================================
+ Hits         1396     1397       +1     
- Misses        851      874      +23     
  Partials      196      196              

Flag	Coverage Δ
api-test	56.62% <ø> (-0.52%)	⬇️

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[leonlnj]

why did the create project return 1 error while the update show error for all 3 tries? can it show the last attempt error only?

[shydefoo]

why did the create project return 1 error while the update show error for all 3 tries? can it show the last attempt error only?

Fixed, see https://github.com/caraml-dev/mlp/pull/105/files#diff-6eb77dcc0646ee76d3d6060bdba73719dfafdc221144a670972b655aedbba058R110

[deadlycoconuts]

LGTM! 🚀 Thanks for these changes!