chore: workflow to print diffs vs libevm-base tag (#18)

* chore: workflow to print diffs vs `libevm-base` tag

* fix: job name

* fix: use `${{ github.ref_name }}` instead of `HEAD`

* fix: use `github.sha` instead of `github.ref_name`

* fix: `fetch-tags: true`

* chore: fml

* fix: `fetch-depth: 0` for more than just 1 commit

* fix: check out branch before performing diff

* chore: `set -x` to aid debugging

* fix: add `--` suffix to `git checkout`

* fix: use `github.ref_name` instead of `github.sha`

* refactor: move all actions inside workflow

* fix: use `github.ref` for full name

* fix: only use explicit diff for `libevm`

* chore: `git diff --color=always`

* feat: color-blindness a11y

.github/workflows/libevm-delta.yml

@@ -0,0 +1,38 @@
+name: libevm delta
+
+on:
+  push:
+    branches: [ libevm ]
+  pull_request:
+    branches: [ libevm ]
+  workflow_dispatch:
+
+jobs:
+  diffs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # everything
+          fetch-tags: true
+      
+      - name: Color-blindness a11y
+        run: | # https://davidmathlogic.com/colorblind/#%23D81B60-%231E88E5-%23FFC107-%23004D40:~:text=8%20pairs%20of%20contrasting%20colors
+          git config color.diff.old "#DC3220";
+          git config color.diff.new "#005AB5";
+
+      - name: git diff libevm-base
+        run: |
+          git diff --diff-filter=a --word-diff --unified=0 --color=always \
+            libevm-base \
+            ':(exclude).golangci.yml' \
+            ':(exclude).github/**';
+      
+      - name: git diff libevm-base..libevm
+        run: |
+          git checkout libevm --;
+          git diff --diff-filter=a --word-diff --unified=0 --color=always \
+            libevm-base \
+            ':(exclude).golangci.yml' \
+            ':(exclude).github/**';
+