Feature/issue label and file preview

[reynandaptr]

• Allow user set labels of issue
• Allow user see the file preview before continue the pipeline

Example:

labels: migration
additional-issue-body-file: ZW52aXJvbm1lbnQ6IHRlc3QKc3FsczoKICAgIC0gQUxURVIgVEFCTEUgInN0b3BzIiBBTFRFUiBDT0xVTU4gImNvb3JkaW5hdGUiIFRZUEUgZ2VvbWV0cnkoUG9pbnQsNDMyNikgVVNJTkcgImNvb3JkaW5hdGUiOjpnZW9tZXRyeShQb2ludCw0MzI2KQogICAgLSBBTFRFUiBUQUJMRSAic3RvcHMiIEFMVEVSIENPTFVNTiAiY29vcmRpbmF0ZSIgU0VUIERFRkFVTFQgbnVsbAo=.yaml

[trstringer]

Thanks for your your contribution! I'm a little confused what the use case is for the additional issue body file?

[rrrkren]

I find the label feature quite useful for automated slack notifications, maybe get that in separately from the issue body file feature?

[trstringer]

I think that's a great idea! @reynandaptr, would you be willing to break this up into two different PRs?

[reynandaptr]

I think that's a great idea! @reynandaptr, would you be willing to break this up into two different PRs?

I will do it

[reynandaptr]

@trstringer could you review my new PR for the labels feature? Thanks