Fix CI world_tests flags and macOS cache key

Use positional args (dist, headless) instead of --flags for world_tests
since Nim interprets --flags as its own options. Also bump macOS cache
key to v4 to match other platforms and refresh stale Godot binaries.

Co-Authored-By: Claude <[email protected]>

Author: dsrw

.github/workflows/dist_linux.yaml

@@ -44,7 +44,7 @@ jobs:
       - name: Run VM tests
         run: nim vm_tests
       - name: Run world tests
-        run: nim world_tests --headless
+        run: nim world_tests headless
       - uses: actions/upload-artifact@v4
         with:
           name: Enu Linux Distribution

.github/workflows/dist_mac.yaml

@@ -59,7 +59,7 @@ jobs:
           path: |
             vendor/godot/bin
             fonts
-          key: ${{ runner.os }}-prereq-cache-v2-${{ hashFiles('.submodules.tmp') }}
+          key: ${{ runner.os }}-prereq-cache-v4-${{ hashFiles('.submodules.tmp') }}
       - name: build prereqs
         run: nim dist_prereqs
         if: steps.prereq-cache.outputs.cache-hit != 'true'
@@ -70,7 +70,7 @@ jobs:
       - name: Run VM tests
         run: nim vm_tests
       - name: Run world tests
-        run: nim world_tests --dist
+        run: nim world_tests dist
       - uses: actions/upload-artifact@v4
         with:
           name: Enu macOS Distribution

.github/workflows/dist_win.yaml

@@ -63,7 +63,7 @@ jobs:
       - name: Run VM tests
         run: nim vm_tests
       - name: Run world tests
-        run: nim world_tests --dist
+        run: nim world_tests dist
 
       # Upload unsigned dist for zip signing
       - name: Upload unsigned dist for zip signing

tasks.nim

@@ -97,12 +97,12 @@ task godot_tests, "run godot tests":
     &"vendor/godot/bin/godot_server.osx.opt.tools.{cpu} --quiet --script tests/tests.gdns"
 
 task world_tests,
-  "run in-world tests (--headless for server build, --dist for dist build)":
+  "run in-world tests (headless for server build, dist for dist build)":
   let
     test_level = this_dir() / "vmlib/worlds/tests/unit-tests"
     params = command_line_params()
-    headless = "--headless" in params
-    use_dist = "--dist" in params
+    headless = "headless" in params
+    use_dist = "dist" in params
 
   let bin =
     if use_dist: