Implement sync testers in sync beta group command

[DechengMa]

Implement sync beta tester feature when run sync beta group command.

Please merge #147 first.

📝 Summary of Changes

Changes proposed in this pull request:

• Add Sync Beta Testers to Push beta group command, and some logic changes.
• add readGroupAndTesters to BetaGroupProcessor
• BetaTesterProcessor change producing file path logic, now using relative path to ./config/betagroup
• BetaTester + Hashable, CodingKeys, SyncResourceProcessable
• Tweak CSV reader, URL(string:) -> URL(fileURLWithPath:)

⚠️ Items of Note

TODO

🧐🗒 Reviewer Notes

💁 Example

Usage

asc testflight betagroup sync push [--input-path <input-path>] [--dry-run]

🔨 How To Test

swift run asc testflight betagroup sync push --dry-run
swift run asc testflight betagroup sync push

How To

Notes: Please run asc testflight betagroup sync pull first

Add a new tester to group

1. find group linked tester csv file.(in group file, testers field)
   Add new invitee information, example:

Email,First Name,Last Name,Invite Type
// some existing testers...
foo@gmail.com,foo,bar,EMAIL // No Space between commas 

2. Run command asc testflight betagroup sync push

Remove tester from group

1. find group linked tester csv file
2. Remove testers you want to delete in csv file. then save.
3. Run command asc testflight betagroup sync push

Create group and testers together.

1. create a csv file under ./config/betagroup folder (or input folder), input tester details like this,

Email,First Name,Last Name,Invite Type // MUST HAVE this header
foo@gmail.com,foo,bar,EMAIL

2. Create a file, name whatever you like. under ./config/betagroup folder (or input folder)

app:
  bundleId: com.example.foo
groupName: a new group
testers: relative csv file path create in step 1. eg(`./config/betagroups/newgrouptesters.csv`)

3. Run command asc testflight betagroup sync push

Update tester

Not supported by API

[DechengMa]

File structure was redesigned so this is no longer needed