Restore organization membership automation

[accorvin]

Description

We have decided to resume using this tool to manage organization membership. This change adds the organization config back along with a new set of automation to manage it.

[github-actions]

yamllint Failed

Show Output

::group::./.github/workflows/apply-org-membership.yaml
::warning file=./.github/workflows/apply-org-membership.yaml,line=3,col=1::3:1 [truthy] truthy value should be one of [false, true]
::endgroup::

::group::./.github/workflows/verify-pull-requests.yaml
::warning file=./.github/workflows/verify-pull-requests.yaml,line=3,col=1::3:1 [truthy] truthy value should be one of [false, true]
::error file=./.github/workflows/verify-pull-requests.yaml,line=35,col=81::35:81 [line-length] line too long (96 > 80 characters)
::endgroup::

Workflow: Verify Pull Requests, Action: __karancode_yamllint-github-action, Lint: .

[riprasad]

/lgtm