chore: refactor ci workflow

Signed-off-by: Chawye Hsu <su+git@chawyehsu.com>

Author: chawyehsu

.github/workflows/ci.yml

@@ -1,48 +1,38 @@
-name: Tests
+name: CI
 
 on:
   pull_request:
   push:
   workflow_dispatch:
 
 jobs:
-  test_powershell:
-    name: WindowsPowerShell
+  test:
+    name: Test
     runs-on: windows-latest
+    strategy:
+      matrix:
+        shell: [powershell, pwsh]
+    defaults:
+      run:
+        shell: ${{ matrix.shell }}
     steps:
       - name: Checkout Bucket
-        uses: actions/checkout@main
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
+          # Need at least 2 commits to properly gather changed files for linting
           fetch-depth: 2
           path: 'my_bucket'
       - name: Checkout Scoop
-        uses: actions/checkout@main
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           repository: ScoopInstaller/Scoop
           path: 'scoop_core'
-      - name: Init and Test
-        shell: powershell
-        run: |
-          $env:SCOOP_HOME="$(Resolve-Path '.\scoop_core')"
-          .\scoop_core\test\bin\init.ps1
-          .\my_bucket\bin\test.ps1
-  test_pwsh:
-    name: PowerShell
-    runs-on: windows-latest
-    steps:
-      - name: Checkout Bucket
-        uses: actions/checkout@main
+      - name: Install and cache test dependencies
+        uses: potatoqualitee/psmodulecache@ee5e9494714abf56f6efbfa51527b2aec5c761b8 # v6.2.1
         with:
-          fetch-depth: 2
-          path: 'my_bucket'
-      - name: Checkout Scoop
-        uses: actions/checkout@main
-        with:
-          repository: ScoopInstaller/Scoop
-          path: 'scoop_core'
-      - name: Init and Test
-        shell: pwsh
+          modules-to-cache: BuildHelpers, Pester
+          shell: ${{ matrix.shell }}
+      - name: Run tests
         run: |
           $env:SCOOP_HOME="$(Resolve-Path '.\scoop_core')"
-          .\scoop_core\test\bin\init.ps1
           .\my_bucket\bin\test.ps1

.github/workflows/excavator.yml

@@ -8,7 +8,7 @@ jobs:
     name: Excavate
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@main
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
     - name: Excavate
       uses: ScoopInstaller/GithubActions@main
       env:

.github/workflows/issue_comment.yml

@@ -7,7 +7,7 @@ jobs:
     name: PullRequestHandler
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@main
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
     - name: PullRequestHandler
       uses: ScoopInstaller/GithubActions@main
       if: startsWith(github.event.comment.body, '/verify')

.github/workflows/issues.yml

@@ -7,7 +7,7 @@ jobs:
     name: IssueHandler
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@main
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
     - name: IssueHandler
       uses: ScoopInstaller/GithubActions@main
       if: github.event.action == 'opened' || (github.event.action == 'labeled' && contains(github.event.issue.labels.*.name, 'verify'))

.github/workflows/pull_request.yml

@@ -7,7 +7,7 @@ jobs:
     name: PullRequestHandler
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@main
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
     - name: PullRequestHandler
       uses: ScoopInstaller/GithubActions@main
       env: