Overhaul: Bump elixir implementation and add comprehensive code coverage.

[Hydepwns]

• Expanded @moduledoc for WorkOS.Organizations with a clear overview and comprehensive usage examples. - Clarified docstrings for function parameters. - No functional changes.

[Hydepwns]

Got to >90% code coverage. I'm interested in bumping to support OTP 27 but a bit constrained on time/resources -- @marktran or @nholden thoughts?

Updating title of pr to be more accurate

[Copilot]

Pull Request Overview

This pull request overhauls the Elixir SDK documentation and CI workflow configurations with expanded module documentation and improved code coverage reporting.

• Added a Codecov badge to README.md for enhanced visibility of test coverage.
• Updated CI workflow: switched branch reference from master to main, bumped the Ubuntu runner version, and integrated new Codecov actions for uploading test results and coverage reports.

Reviewed Changes

Copilot reviewed 20 out of 38 changed files in this pull request and generated no comments.

File	Description
README.md	Added a Codecov badge and removed a stray header line.
.github/workflows/main.yml	Updated CI configurations including Ubuntu version bump and Codecov upload steps.

Files not reviewed (18)

• lib/workos/castable.ex: Language not supported
• lib/workos/client.ex: Language not supported
• lib/workos/organizations.ex: Language not supported
• lib/workos/sso.ex: Language not supported
• lib/workos/user_management/multi_factor/sms.ex: Language not supported
• lib/workos/user_management/multi_factor/totp.ex: Language not supported
• lib/workos/user_management/organization_membership.ex: Language not supported
• lib/workos/user_management/reset_password.ex: Language not supported
• lib/workos/user_management/user.ex: Language not supported
• mix.exs: Language not supported
• test/support/audit_logs_client_mock.ex: Language not supported
• test/support/directory_sync_client_mock.ex: Language not supported
• test/support/directory_sync_client_mock_test.exs: Language not supported
• test/support/events_client_mock.ex: Language not supported
• test/support/organization_domains_client_mock.ex: Language not supported
• test/support/organizations_client_mock.ex: Language not supported
• test/support/passwordless_client_mock.ex: Language not supported
• test/support/portal_client_mock.ex: Language not supported

Comments suppressed due to low confidence (1)

README.md:37

• [nitpick] The removal of the stray '###' markdown header just above the SDK Versioning section may have been unintentional. Please confirm if this deletion was deliberate.

## SDK Versioning