Provide a way to trigger Git mirroring manually

[ikhoon]

Motivation:

• There is no easy way to test Git mirroring configurations.
• Some users may want to run Git mirroring manually instead of using the periodic scheduler.

Modifications:

• Add POST /projects/{projectName}/mirrors/{mirrorId}/run REST API to MirroringServiceV1 so as to trigger a mirroring task.
• Add verboseResponses to CentralDogmaConfig so as to contain full stack traces in error responses.
  • The cause of mirroring failures will be displayed in the UI for administrators or verboseResponses is enabled.
• Change AbstractMirror to return MirrorResult which is used to notify the result in the UI.
• Make MirrorDto.schedule nullable.
  • Exclude a mirror configuration from scheduling schedule it is null.
• Move MirrorException to common and expose it in the error responses.
• Add cronstrue dependency to package.json to display a human readable description on the mirror form UI.
• Increase maxWidth of NotificationWrapper to render stack traces well.

Result:

• You can now trigger a mirroring task in the mirror UI.
• Fixes #700
• Fixes #236

[ikhoon]

https://github.com/user-attachments/assets/dcd738ce-39ab-4252-a19f-b35556c73170

[minwoox]

Is this ready?

[ikhoon]

Sorry, I missed the test failure. Fixed it. PTAL.