chore(ci): add workflow to check semantic PR summary

[axi92]

This workflow will first trigger when its on the main branch and a new PR is created to main.

Quote from the workflow docs:

pull_request_target: This allows the action to be used in a fork-based workflow, where e.g. you want to accept pull requests in a public repository. In this case, the configuration from the main branch of your repository will be used for the check. This means that you need to have this configuration in the main branch for the action to run at all (e.g. it won't run within a PR that adds the action initially). Also if you change the configuration in a PR, the changes will not be reflected for the current PR – only subsequent ones after the changes are in the main branch.

Source