Migrate build system to CMake

See #5895 for details.

This commit does not include CI or documentation changes.

misc/cmake/check_missing_depends.sh

@@ -0,0 +1,9 @@
+# Builds each Yosys component individually to make sure there aren't any missing static dependencies.
+# Checking for dynamic dependencies would involve running the testsuite, which is much slower.
+
+set -e
+cmake .. -G Ninja -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_LINKER_TYPE=LLD
+for comp in $(ninja --quiet print-yosys-components); do
+	cmake . -DCOMPONENTS=$comp
+	ninja --quiet yosys
+done