Add support for credentials file

[ramya18101]

🔧 Changes

Add support to use tenant credentials details from the local file with the command : auth0 login --profile <tenant-profile

📚 References

#1234

🔬 Testing

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[kushalshit27]

It's better if profiles can use common variable across profile

example:

[common]
tenant = your-tenant.auth0.com

[dev-profile-1]
client_id = YOUR_CLIENT_ID_1
client_secret = YOUR_CLIENT_SECRET_1

[dev-profile-2]
client_id = YOUR_DEV_CLIENT_ID_2
client_secret = YOUR_DEV_CLIENT_SECRET_2

[kushalshit27]

• show the list of current profiles

--profile ls

[ramya18101]

1. In most cases, we log in using different tenants, and each profile can correspond to a different tenant. So, I don't see much value in having a common one.

2. Profiles are manually stored locally by the user, so I see less benefit in supporting a list command just to view what they’ve explicitly added to their local file.
   Besides, we already have the tenants ls command to view currently logged-in tenants.

[kushalshit27]

• Using common variable is a very standard and useful pattern example, .gitconfig (core)
• --profile ls is or --profile <profile-name> will improve cli experience.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 20.40816% with 39 lines in your changes missing coverage. Please review.

Project coverage is 65.38%. Comparing base (3f49393) to head (9702c68).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/cli/login.go	20.40%	34 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1246      +/-   ##
==========================================
- Coverage   65.50%   65.38%   -0.12%     
==========================================
  Files         108      108              
  Lines       16351    16390      +39     
==========================================
+ Hits        10711    10717       +6     
- Misses       4995     5025      +30     
- Partials      645      648       +3     

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