Add workflows for testing technique execution

.github/workflows/test-linux-technique.yml

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+name: Test a Linux Technique
+on:
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  test-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ./
+        with:
+          technique: T1005
+          test-numbers: 2

.github/workflows/test-macos-technique.yml

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+name: Test a macOS Technique
+on:
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  test-macos:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ./
+        with:
+          technique: T1078.001
+          test-numbers: 3

.github/workflows/test-windows-technique.yml

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+name: Test a Windows Technique
+on:
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  test-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ./
+        with:
+          technique: T1055.003
+          test-numbers: 1