ci: re-enable lint and test jobs

Windows smoke test passes with the gh: command (using local clone
fallback pre-merge). Re-enable all Linux CI jobs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: JonZeolla

.github/workflows/ci.yml

@@ -23,7 +23,6 @@ defaults:
 
 jobs:
   lint:
-    if: false  # Temporarily disabled while iterating on Windows support
     name: Lint
     runs-on: ubuntu-24.04
     steps:
@@ -39,7 +38,6 @@ jobs:
       - name: Lint
         run: task -v lint
   test:
-    if: false  # Temporarily disabled while iterating on Windows support
     name: Test
     runs-on: ubuntu-24.04
     permissions: