feat: checksum pinning (#2223)

testdata/includes_checksum/correct/Taskfile.yml

@@ -0,0 +1,12 @@
+version: '3'
+
+includes:
+  included:
+    taskfile: ../included.yml
+    internal: true
+    checksum: c97f39eb96fe3fa5fe2a610d244b8449897b06f0c93821484af02e0999781bf5
+
+tasks:
+  default:
+    cmds:
+      - task: included:default

testdata/includes_checksum/correct/testdata/TestIncludeChecksum-correct.golden

@@ -0,0 +1,2 @@
+task: [included:default] echo "Hello, World!"
+Hello, World!

testdata/includes_checksum/correct_remote/Taskfile.yml

@@ -0,0 +1,12 @@
+version: '3'
+
+includes:
+  included:
+    taskfile: https://taskfile.dev
+    internal: true
+    checksum: c153e97e0b3a998a7ed2e61064c6ddaddd0de0c525feefd6bba8569827d8efe9
+
+tasks:
+  default:
+    cmds:
+      - task: included:default

testdata/includes_checksum/included.yml

@@ -0,0 +1,6 @@
+version: '3'
+
+tasks:
+  default:
+    cmds:
+      - echo "Hello, World!"

testdata/includes_checksum/incorrect/Taskfile.yml

@@ -0,0 +1,12 @@
+version: '3'
+
+includes:
+  included:
+    taskfile: ../included.yml
+    internal: true
+    checksum: foo
+
+tasks:
+  default:
+    cmds:
+      - task: included:default

testdata/includes_checksum/incorrect/testdata/TestIncludeChecksum-incorrect-err-setup.golden

@@ -0,0 +1,3 @@
+task: The checksum of the Taskfile at "/testdata/includes_checksum/included.yml" does not match!
+got: "c97f39eb96fe3fa5fe2a610d244b8449897b06f0c93821484af02e0999781bf5"
+want: "foo"