feat(editor): add WOL JSON round-trip authoring workflow

Two new commands enable a hand-edit authoring loop for the
binary .wol format:

  • --export-wol-json <wol-base> [out.json]
        Dumps a .wol to a human-readable JSON sidecar
        (defaults to <base>.wol.json). Preserves every
        keyframe's time, ambient/directional/fog colors,
        directional vector, and fog distances.

  • --import-wol-json <json-path> [out-base]
        Reads a JSON sidecar and writes back binary .wol.
        Validates schema strictly — missing keyframes /
        wrong field types fail with a clear error message.

Workflow: --gen-light → --export-wol-json → hand-edit values
in any text editor → --import-wol-json → use in renderer.

Round-trip verified byte-for-byte identical on the existing
sunny.wol fixture: re-import produces the same 4 keyframes
with the same colors, fog distances, and zone name.

tools/editor/cli_arg_required.cpp

@@ -17,6 +17,7 @@ const char* const kArgRequired[] = {
     "--info-wob", "--info-wob-stats", "--info-woc", "--info-wot",
     "--info-wol", "--info-wol-at", "--validate-wol", "--gen-light",
     "--gen-light-cave", "--gen-light-dungeon", "--gen-light-night",
+    "--export-wol-json", "--import-wol-json",
     "--info-wow", "--validate-wow",
     "--gen-weather-temperate", "--gen-weather-arctic",
     "--gen-weather-desert", "--gen-weather-stormy",