feat(Taskfile): add check for clean working tree before release

- add a precondition to ensure the working tree is clean before releasing

🤖

Taskfile.yml

@@ -21,6 +21,8 @@ tasks:
     preconditions:
       - sh: test "{{.BRANCH}}" == "main"
         msg: "You must be on the main branch to release"
+      - sh: test -z "$(git status --porcelain)"
+        msg: "You must have a clean working tree to release"
     prompt: Create new release {{.RELEASE}} from {{.COMMIT}}@{{.BRANCH}}?
     cmds:
       - git tag {{.RELEASE}}