Conditionally clear umask if non-windows build

Better identify different config states

Fix typo

Merge pull request #58 from A2-ai/feat/format-migration

Add `migrate` command

Chmod after creating directories and files to override umask

Merge pull request #48 from A2-ai/feature/hash-cache

Add local file hash caching

Update readme with blob syntax

Return bare string for version command

Merge pull request #45 from A2-ai/feature/better-glob

Better glob handling

Merge pull request #36 from A2-ai/feature/disallow-external-files

Ensure add files are in git repository