new action: branch-solution

New action 'branch-solution' will take an unpacked solution folder.
Then stage that folder's changes as a branch to the current git repo and push that branch back to origin.
The solution author can then create a github PullRequest from that branch and have it reviewed, before merging it back to the main branch.

clone-solution

added clone-solution

pack-solution & import-solution

add actions: pack-solution and import-solution
add those to CI flow
refresh dist

Fix pack-solution param names

choose common names for folder and zip file that work for both unpack and pack solution actions:

• solution-file (was: solution-input-file)
• solution-folder (was: solution-target-folder)

Initial beta

Initial beta:

• exposes 3 actions with only username/password authN:
  • who-am-i
  • export-solution
  • unpack-solution