Initial commit for vulkan tutorial

Following along the first 9 chapters of the Vulkan HelloTriangle
tutorial.

CMake/Findstb.cmake

@@ -0,0 +1,86 @@
+# Findstb.cmake
+#
+# Finds the stb library (specifically stb_image.h)
+#
+# This will define the following variables
+#
+#    stb_FOUND
+#    stb_INCLUDE_DIRS
+#
+# and the following imported targets
+#
+#    stb::stb
+#
+
+# Try to find the package using pkg-config first
+find_package(PkgConfig QUIET)
+if(PKG_CONFIG_FOUND)
+  pkg_check_modules(PC_stb QUIET stb)
+endif()
+
+# Find the include directory
+find_path(stb_INCLUDE_DIR
+  NAMES stb_image.h
+  PATHS
+    ${PC_stb_INCLUDE_DIRS}
+    /usr/include
+    /usr/local/include
+    $ENV{VULKAN_SDK}/include
+    ${ANDROID_NDK}/sources/third_party
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../external
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../third_party
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../attachments/external
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../attachments/third_party
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../attachments/include
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../../external
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../../third_party
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../../include
+  PATH_SUFFIXES stb
+)
+
+# If the include directory wasn't found, use FetchContent to download and build
+if(NOT stb_INCLUDE_DIR)
+  # If not found, use FetchContent to download and build
+  include(FetchContent)
+
+  message(STATUS "stb_image.h not found, fetching from GitHub...")
+  FetchContent_Declare(
+    stb
+    GIT_REPOSITORY https://github.com/nothings/stb.git
+    GIT_TAG master  # stb doesn't use version tags, so we use master
+  )
+
+  # Set policy to suppress the deprecation warning
+  if(POLICY CMP0169)
+    cmake_policy(SET CMP0169 OLD)
+  endif()
+
+  # Populate the content
+  FetchContent_GetProperties(stb)
+  if(NOT stb_POPULATED)
+    FetchContent_Populate(stb)
+  endif()
+
+  # stb is a header-only library with no CMakeLists.txt, so we just need to set the include directory
+  set(stb_INCLUDE_DIR ${stb_SOURCE_DIR})
+endif()
+
+# Set the variables
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(stb 
+  REQUIRED_VARS stb_INCLUDE_DIR
+)
+
+if(stb_FOUND)
+  set(stb_INCLUDE_DIRS ${stb_INCLUDE_DIR})
+
+  # Create an imported target
+  if(NOT TARGET stb::stb)
+    add_library(stb::stb INTERFACE IMPORTED)
+    set_target_properties(stb::stb PROPERTIES
+      INTERFACE_INCLUDE_DIRECTORIES "${stb_INCLUDE_DIRS}"
+    )
+  endif()
+endif()
+
+mark_as_advanced(stb_INCLUDE_DIR)