feat: added provider struct method: GetCorrelatingEvent

[omri2001]

Description

Added a method to provider struct 'GetCorrelatingEvent' for translating workflow events into the corresponding provider.

Related Issue(s)

#29

Checklist

Before submitting this pull request, please ensure that you have completed the following tasks:

• Reviewed the Contributing Guidelines for the Piper project.
• Ensured that your changes follow the coding guidelines and style of the project.
• Run the tests locally and made sure they pass.
• Updated the relevant documentation, if applicable.

[omri2001]

also on webhook_creator/main.go <line 96> there is a specific implementation for bitbucket which should also be handled, idk if you want to fix it in this pr or open another for it.
Currently left untouched

[GoshaDo]

Looks good, can you please add tests ?

[GoshaDo]

also on webhook_creator/main.go <line 96> there is a specific implementation for bitbucket which should also be handled, idk if you want to fix it in this pr or open another for it. Currently left untouched

Maybe we should re-think the way to manage git provider at all..
Using a controller with CRDs maybe can help us ..