CPM added and directory structure changed

Switch to using CPM package manager instead of vcpkg as its just a wrapper around cmake and makes things more simple.

Switch dependency from spdlog to fmt.

Changed the directory structure to match the setup recommended by GitLab

cmake/staticanalysis.cmake

@@ -0,0 +1,16 @@
+include_guard()
+
+function(target_enable_static_analysis _target)
+    set(_VS_CLANG_TIDY "false")
+    find_program(CLANGTIDY clang-tidy)
+    if(CLANGTIDY)
+        set(_VS_CLANG_TIDY "true")
+    endif()
+    set_target_properties(
+        ${_target}
+        PROPERTIES
+        VS_GLOBAL_EnableMicrosoftCodeAnalysis true
+        VS_GLOBAL_CodeAnalysisRuleSet "AllRules.ruleset"
+        VS_GLOBAL_EnableClangTidyCodeAnalysis "${_VS_CLANG_TIDY}"
+    )
+endfunction()