Allow .dot files/directories to be properly copied back after caching

[IgnusG]

The cache is properly created for hidden (.dot) files and directories but these are not copied back after a cache hit since globby's default is to not include them:

backfill/packages/cache/src/LocalCacheStorage.ts

Lines 28 to 30 in 3df30b0

	const files = await globby(`**/*`, {
	cwd: localCacheFolder,
	});

These lines should either be:

    const files = await globby(`**/*`, {
      cwd: localCacheFolder,
      dot: true,
    });

Or they should be made configurable.