chore(build): add vendored glew-cmake-2.2.0 library

vendor/glew-cmake-2.2.0/build/cmake/testbuild/CMakeLists.txt

@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.16)
+project(glew-cmake-test LANGUAGES C)
+
+find_package(GLEW REQUIRED CONFIG)
+find_package(GLEW REQUIRED CONFIG) # call twice to test multiple call
+find_package(OpenGL REQUIRED)
+
+add_executable(cmake-test main.c)
+set_target_properties(cmake-test PROPERTIES DEBUG_POSTFIX _d)
+target_link_libraries(cmake-test PRIVATE GLEW::GLEW ${OPENGL_LIBRARIES})
+target_include_directories(cmake-test PRIVATE ${OPENGL_INCLUDE_DIR})
+
+target_compile_definitions(cmake-test PRIVATE
+    -DGLEW_CMAKE_TEST_CONFIG=$<CONFIG>
+    -DGLEW_CMAKE_TEST_TARGET_FILE_NAME=$<TARGET_FILE_NAME:GLEW::GLEW>
+    -DGLEW_CMAKE_TEST_TARGET_TYPE=$<TARGET_PROPERTY:GLEW::GLEW,TYPE>
+    )
+
+install(TARGETS cmake-test DESTINATION bin COMPONENT Runtime)

vendor/glew-cmake-2.2.0/build/cmake/testbuild/main.c

@@ -0,0 +1,23 @@
+#include <GL/glew.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define S(x) SS(x)
+#define SS(x) #x
+
+int main(int argc, char* argv[]) {
+    printf("GLEW CMake test, %s build\n",
+        S(GLEW_CMAKE_TEST_CONFIG));
+    printf("-- linked to %s which is %s\n",
+        S(GLEW_CMAKE_TEST_TARGET_FILE_NAME),
+        S(GLEW_CMAKE_TEST_TARGET_TYPE));
+    const GLubyte* v = glewGetString(GLEW_VERSION);
+    if(v) {
+        printf("-- glewGetString(GLEW_VERSION) returns %s\n-- test passed.\n", v);
+        return EXIT_SUCCESS;
+    } else {
+        printf("-- glewGetString(GLEW_VERSION) returns NULL\n-- test failed.\n");
+        return EXIT_FAILURE;
+    }
+}