feat(pipeline): add Wowee Open Light (.wol) atmosphere format

New open replacement for WoW's Light.dbc / LightParams.dbc /
LightIntBand.dbc / LightFloatBand.dbc stack — a single .wol
file holds a list of time-of-day keyframes for one zone,
each capturing the ambient + directional + fog state at that
moment. The renderer interpolates between adjacent keyframes
by time-of-day.

Binary layout:
  magic[4] = "WOLA", version (uint32),
  nameLen + name bytes,
  keyframeCount + keyframes (each 13 floats + 1 uint32 time)

Per keyframe:
  • timeOfDayMin (0..1439 = minutes since midnight)
  • ambientColor.rgb, directionalColor.rgb, directionalDir.xyz
  • fogColor.rgb, fogStart, fogEnd

CLI:
  • --gen-light <wol-base> [zoneName] — emit a starter file
    with 4-keyframe day/night cycle (midnight/dawn/noon/dusk)
    using reasonable outdoor defaults
  • --info-wol <wol-base> [--json] — inspect: zone name +
    per-keyframe time-of-day + colors + fog distances

The 7th open-format addition to the Wowee pipeline:
  M2  → WOM (model)
  WMO → WOB (building)
  WMO collision → WOC
  ADT → WOT (terrain)
  DBC → JsonDBC
  BLP → PNG
  Light.dbc family → WOL  ← new

Smoke-tested round-trip: gen → info shows correct 4 keyframes
at 00:00 / 06:00 / 12:00 / 18:00 with the canonical color
ramps. JSON output for tooling integration.

include/pipeline/wowee_light.hpp

@@ -0,0 +1,64 @@
+#pragma once
+
+#include <glm/glm.hpp>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace wowee {
+namespace pipeline {
+
+// Wowee Open Light format (.wol) — novel replacement for WoW's
+// Light.dbc / LightParams.dbc / LightIntBand.dbc / LightFloatBand.dbc
+// stack. A WOL file holds a list of time-of-day keyframes for one
+// zone, each capturing the ambient + directional + fog state at that
+// moment. The renderer interpolates between adjacent keyframes by
+// time-of-day.
+//
+// Binary layout (little-endian):
+//   magic[4]            = "WOLA"
+//   version (uint32)    = current 1
+//   nameLen (uint32)
+//   name bytes (nameLen)
+//   keyframeCount (uint32)
+//   keyframes (each):
+//     timeOfDayMin (uint32)         -- 0..1439, minutes since midnight
+//     ambientColor.rgb (3 × float)
+//     directionalColor.rgb (3 × float)
+//     directionalDir.xyz (3 × float)  -- unit vector pointing FROM
+//                                        the sun TO the surface
+//     fogColor.rgb (3 × float)
+//     fogStart (float)              -- meters
+//     fogEnd (float)                -- meters
+struct WoweeLight {
+    struct Keyframe {
+        uint32_t timeOfDayMin = 0;
+        glm::vec3 ambientColor{0.20f, 0.20f, 0.25f};
+        glm::vec3 directionalColor{0.95f, 0.92f, 0.85f};
+        glm::vec3 directionalDir{0.0f, -1.0f, 0.0f};
+        glm::vec3 fogColor{0.65f, 0.70f, 0.78f};
+        float fogStart = 80.0f;
+        float fogEnd = 600.0f;
+    };
+
+    std::string name;                  // zone or scene name
+    std::vector<Keyframe> keyframes;   // sorted by timeOfDayMin
+
+    bool isValid() const { return !keyframes.empty(); }
+};
+
+class WoweeLightLoader {
+public:
+    static bool save(const WoweeLight& light, const std::string& basePath);
+    static WoweeLight load(const std::string& basePath);
+    static bool exists(const std::string& basePath);
+
+    // Convenience: emit a 4-keyframe day/night cycle (dawn 6:00,
+    // noon 12:00, dusk 18:00, midnight 0:00) with reasonable
+    // outdoor defaults. Used by --gen-light to create a starter
+    // file users can edit.
+    static WoweeLight makeDefaultDayNight(const std::string& zoneName);
+};
+
+} // namespace pipeline
+} // namespace wowee