Add GitHub Actions workflow for testing on every PR

[Xkonti]

Tests should be ran on every Pull Request. This will allow for:

• Blocking merges if tests are failing
• Will send clear message to contributors and maintainers that there's an issue (and often will hint where it's at)

Tests should be ran only for Pull Requests and not for merges to main branch as PRs are the only way to commit to main.

This could be a starting point for .github/workflows/pr-check.yml file:

name: Test PR

on:
  pull_request:
    branches:
      - main

jobs:
  check-pr:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Set up Go
        uses: ???

      - name: Run tests
        uses: ???

[Pr0-C0der]

Hey, I can do this. Can you please assign this to me? @Xkonti

[Xkonti]

Sure thing!