Add support for project_card events

[prince-chrismc]

What you want to add

I would like to add a label when my project cards are moved and they are issues.

The issue number can be found in the "content_ur" of the payload https://docs.github.com/en/rest/reference/projects#cards
I'd like to add some logic around

action-add-labels/src/main.ts

Line 15 in 288072f

? github.context.issue.number

Why this is needed

Large projects need to be organized and this would help avoid having two actions to add labels (this one is better minus a missing feature)

If this is a desired feature I'd love to open a PR