Add actions/labeler Github Workflow

[enfipy]

Problem Statement

Currently, you need to specify almost all labels to Pull Requests by yourself or another team member.

For new contributors, we will need to specify labels manually after they submit new PRs. Even if most of the labels already can be set by automatic check (what files have changed, etc.).

Solution Brainstorm

Create a new Github Workflow file with https://github.com/actions/labeler integration.

Configure it to set most of the "Area: ..." labels depending on what files have changed in the Pull Request, and constantly monitor for new labels as there will be new commits in a PR.