chore: enhance clangd and CI configurations for improved development experience

- Updated `.clangd` configuration to include additional include paths and feature flags tailored for ROM hacking workflows, optimizing IntelliSense support.
- Introduced `.pre-commit-config.yaml` for managing code quality checks and formatting, ensuring consistent code style across the project.
- Added `cmake-format.yaml` for CMake formatting configuration, promoting adherence to style guidelines.
- Enhanced CI workflows to include new actions for testing and building, improving overall reliability and efficiency in the development process.

Benefits:
- Streamlines development setup and improves code quality through automated checks.
- Facilitates better collaboration by ensuring consistent coding standards and configurations.

cmake/CPM.cmake

@@ -0,0 +1,48 @@
+# CPM.cmake - C++ Package Manager
+# https://github.com/cpm-cmake/CPM.cmake
+
+set(CPM_DOWNLOAD_VERSION 0.38.7)
+
+if(CPM_SOURCE_CACHE)
+  set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+elseif(DEFINED ENV{CPM_SOURCE_CACHE})
+  set(CPM_DOWNLOAD_LOCATION "$ENV{CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+else()
+  set(CPM_DOWNLOAD_LOCATION "${CMAKE_BINARY_DIR}/cmake/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+endif()
+
+# Expand relative path. This is important if the provided path contains a tilde (~)
+get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
+
+function(download_cpm)
+  message(STATUS "Downloading CPM.cmake to ${CPM_DOWNLOAD_LOCATION}")
+  file(DOWNLOAD
+       https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
+       ${CPM_DOWNLOAD_LOCATION}
+  )
+endfunction()
+
+if(NOT (EXISTS ${CPM_DOWNLOAD_LOCATION}))
+  download_cpm()
+else()
+  # resume download if it previously failed
+  file(READ ${CPM_DOWNLOAD_LOCATION} check)
+  if("${check}" STREQUAL "")
+    download_cpm()
+  endif()
+endif()
+
+include(${CPM_DOWNLOAD_LOCATION})
+
+# Set CPM options for better caching and performance
+set(CPM_USE_LOCAL_PACKAGES ON)
+set(CPM_LOCAL_PACKAGES_ONLY OFF)
+set(CPM_DONT_CREATE_PACKAGE_LOCK ON)
+set(CPM_DONT_UPDATE_MODULE_PATH ON)
+set(CPM_DONT_PREPEND_TO_MODULE_PATH ON)
+
+# Set cache directory for CI builds
+if(DEFINED ENV{GITHUB_ACTIONS})
+  set(CPM_SOURCE_CACHE "$ENV{HOME}/.cpm-cache")
+  message(STATUS "CPM cache directory: ${CPM_SOURCE_CACHE}")
+endif()