Move step running into enum for dynamic ordering (#1188)

Co-authored-by: Stuart Reilly <sreilly@scottlogic.com>

.github/workflows/ci.yml

@@ -35,15 +35,29 @@ jobs:
       - name: Check if `Step` enum is sorted
         run: |
           ENUM_NAME="Step"
-          FILE="src/config.rs"
+          FILE="src/step.rs"
           awk "/enum $ENUM_NAME/,/}/" "$FILE" | \
           grep -E '^\s*[A-Za-z_][A-Za-z0-9_]*\s*,?$' | \
           sed 's/[, ]//g' > original.txt
           sort original.txt > sorted.txt
           diff original.txt sorted.txt
 
+  step-match-sorted:
+    name: Step match sorted
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Check if `Step::run()`'s match is sorted
+        run: |
+          FILE="src/step.rs"
+          awk '/[[:alpha:]] =>/{print $1}' $FILE > original.txt
+          sort original.txt > sorted.txt
+          diff original.txt sorted.txt
+  
   main:
-    needs: [fmt, step-enum-sorted]
+    needs: [ fmt, step-enum-sorted, step-match-sorted ]
     name: ${{ matrix.target_name }} (check, clippy)
     runs-on: ${{ matrix.os }}
     strategy: