…ing flows

…nstallation tokens

- Populate storageLocation and implement isStorageLocationApplicable
- Determine read/write permissions for the repo based on the client credentials
- Use the permissions to populate bucket permissions
- Change logic for creating default bucket to only happen if no other buckets and if write permissions
- Verify permissions accordingly in all client methods based on read or write
- Consolidate getFilenames and getDirectoryNames to helper method