Move tusddumpcrate to top-level tools directory

Reorganize the USDC crate debugging tool for better project structure:
- Move tusddumpcrate from sandbox/crate-writer/examples/ to tools/tusddumpcrate/
- Create dedicated CMakeLists.txt for the tool
- Add tools/tusddumpcrate subdirectory to main CMakeLists.txt
- Remove old build target from sandbox/crate-writer/CMakeLists.txt

The tool is now available as a standard TinyUSDZ tool alongside other utilities.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CMakeLists.txt

@@ -1592,6 +1592,9 @@ if(TINYUSDZ_BUILD_EXAMPLES)
   endif()
 endif(TINYUSDZ_BUILD_EXAMPLES)
 
+# Tools
+add_subdirectory(tools/tusddumpcrate)
+
 if(TINYUSDZ_BUILD_BENCHMARKS)
 
   #

sandbox/crate-writer/CMakeLists.txt

@@ -128,20 +128,6 @@ if(BUILD_CRATE_WRITER_EXAMPLES)
     ${CMAKE_CURRENT_SOURCE_DIR}/../../src
     ${CMAKE_CURRENT_SOURCE_DIR}/../../
   )
-
-  # Tool: Structured Crate Dump (YAML/JSON)
-  add_executable(tusddumpcrate
-    examples/tusddumpcrate.cc
-  )
-
-  target_link_libraries(tusddumpcrate
-    ${TINYUSDZ_STATIC_LIB}
-  )
-
-  target_include_directories(tusddumpcrate PRIVATE
-    ${CMAKE_CURRENT_SOURCE_DIR}/../../src
-    ${CMAKE_CURRENT_SOURCE_DIR}/../../
-  )
 endif()
 
 # ============================================================================

tools/tusddumpcrate/CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.16)
+
+# Tool: Structured Crate Dump (YAML/JSON)
+# Dumps USDC crate file structure in YAML format for efficient debugging
+add_executable(tusddumpcrate
+  tusddumpcrate.cc
+)
+
+target_link_libraries(tusddumpcrate
+  ${TINYUSDZ_TARGET_STATIC}
+)
+
+target_include_directories(tusddumpcrate PRIVATE
+  ${PROJECT_SOURCE_DIR}/src
+  ${PROJECT_SOURCE_DIR}
+)