Load cutscenes directly from JSONC at runtime, fix asset bundling staleness

Cutscenes now parse their authored .jsonc straight into the runtime
cutsceneitem_t/pool representation via yyjson, instead of going through a
separate Python-compiled DCTS binary format - removes the whole
build/compile step and the byte-format contract between the Python
encoder and the C decoder, at the cost of a (still tiny, one-time)
parse per cutscene load.

Also fixes dusk.dsk going stale after a build: the old custom_command
depended on a CMake-configure-time file glob, which only re-detects
added/removed assets on the next configure and could miss edits
entirely. tools.asset.pack now always runs and decides for itself
(via a small manifest) whether anything actually needs repacking, so
asset changes are never missed regardless of add/edit/remove.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

CMakeLists.txt

@@ -122,18 +122,21 @@ if(DUSK_BUILD_TESTS)
   add_subdirectory(test)
 endif()
 
-# Build assets
-file(GLOB_RECURSE DUSK_ASSET_FILES CONFIGURE_DEPENDS "${DUSK_ASSETS_DIR}/*")
-add_custom_command(
-  OUTPUT "${DUSK_ASSETS_ZIP}"
+# Build assets. Runs unconditionally on every build (rather than being
+# gated behind a custom_command's file-level DEPENDS list) because
+# CONFIGURE_DEPENDS globs only pick up added/removed files on the next
+# CMake configure, so that approach could miss/lag a rebuild behind an
+# asset edit. tools.asset.pack itself decides whether anything actually
+# changed (see its manifest check) and no-ops quickly when nothing did,
+# so this stays cheap on a build where assets are untouched.
+add_custom_target(DUSK_ASSETS_BUILT ALL
   COMMAND ${CMAKE_COMMAND} -E make_directory "${DUSK_ASSETS_DIR}"
-  COMMAND ${CMAKE_COMMAND} -E rm -f "${DUSK_ASSETS_ZIP}"
   COMMAND ${Python3_EXECUTABLE} -m tools.asset.pack
     --input "${DUSK_ASSETS_DIR}"
     --output "${DUSK_ASSETS_ZIP}"
   WORKING_DIRECTORY "${DUSK_ROOT_DIR}"
-  DEPENDS ${DUSK_ASSET_FILES}
+  BYPRODUCTS "${DUSK_ASSETS_ZIP}"
+  COMMENT "Packing assets into dusk.dsk"
   VERBATIM
 )
-add_custom_target(DUSK_ASSETS_BUILT DEPENDS "${DUSK_ASSETS_ZIP}")
 add_dependencies(${DUSK_LIBRARY_TARGET_NAME} DUSK_ASSETS_BUILT)