[CI] Improve checks (#71)

* [CI] Improve checks

- Adds .actrc so CI actions can be tested locally
- Adds testing for variants of features so changes that break feature
  sets like disabling games can be caught
- Adds more of the CI tests to pre-commit

* [CI] Add more feature sets to test

* [CI] Check github actions before comitting

Requires act: https://github.com/nektos/act

* [CI] Add caching between builds

* [CI] Add caching everywhere

* [CI] Add more feature tests

* [CI] Add YAML schemas

* [CI] Disable audit when running locally

This is needed because the audit action requires a GITHUB_TOKEN which we
don't have when running locally.

* [CI] Move clippy to own job and use action that annotates PRs

Using actions-rs/clippy-check means that PRs will problems will
automatically have the relevant lines annotated

* [CI] Don't unnecessarily cache targets for fmt

.github/workflows/audit.yml

@@ -1,3 +1,4 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/softprops/github-actions-schemas/master/workflow.json
 name: Security audit
 on:
   push:
@@ -12,3 +13,4 @@ jobs:
       - uses: rustsec/audit-check@v1.4.1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
+        if: ${{ !env.ACT }} # skip during local actions testing