feat(project-template): clang-tidy targets

• Add clang-tidy targets to project

• add .clang-tidy file containing our settings and some configs according to our coding guidelines
• add three explicit targets for calling just lint or lint-and-fix, lint-and-fix-and-commit-after-each-fix
• add enable-able support for CMake"s "native" clang-tidy support (makes build super-slow)

cmake/add_linter_target.cmake

+set(CTK_CLANG_TIDY_VERSION "14" CACHE STRING "Version of the clang-tidy binary to use")
+set(CTK_ENABLE_TIDY_WHILE_BUILDING OFF CACHE BOOL "Whether to run clang-tidy on every compilation unit")
+if (CTK_ENABLE_TIDY_WHILE_BUILDING)
+    set(CMAKE_CXX_CLANG_TIDY /usr/bin/clang-tidy-${CTK_CLANG_TIDY_VERSION};-config-file=${CMAKE_SOURCE_DIR}/.clang-tidy)
+    set(CMAKE_C_CLANG_TIDY /usr/bin/clang-tidy-${CTK_CLANG_TIDY_VERSION};-config-file=${CMAKE_SOURCE_DIR}/.clang-tidy)
+endif()
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+add_custom_target(run-linter COMMAND run-clang-tidy-${CTK_CLANG_TIDY_VERSION} -p ${CMAKE_BINARY_DIR} WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
+add_custom_target(fix-linter-stepwise COMMAND ${CMAKE_SOURCE_DIR}/cmake/fix-linter-for-all.py --tidy=clang-tidy-${CTK_CLANG_TIDY_VERSION} --apply-tool=clang-apply-replacements-${CTK_CLANG_TIDY_VERSION} --exclude="${CMAKE_BINARY_DIR}" ${CMAKE_BINARY_DIR}/compile_commands.json
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
+add_custom_target(fix-linter COMMAND run-clang-tidy-${CTK_CLANG_TIDY_VERSION} -fix -format -p ${CMAKE_BINARY_DIR} WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
+
+