feat: Add unified quality-check script and git hook support

Move the `make doublecheck` functionality into a build system agnostic
script.

`scripts/quality-check.sh` can now be used to check for spelling via
codespell, formatting clang-format and run the unit tests.

`make doublecheck` and `meson compile doublecheck` will call this
script.

Sometimes we have issues with different versions of clang-format locally
vs our CI. In this case SKIP_FORMAT env variable can be set.

meson.build

@@ -676,6 +676,10 @@ if get_option('tests')
   endif
 endif
 
+run_target('doublecheck',
+  command: ['scripts/quality-check.sh', '--fix-formatting', '--meson']
+)
+
 summary({
   'Platform': platform,
   'Package status': get_option('buildtype'),