feat: add organization flags to auth0 apps create and update

[developerkunal]

🔧 Changes

Adds three flags to auth0 apps create and auth0 apps update so an application's organization behavior can be configured directly, without dropping to the raw auth0 api command:

• --organization-usage — deny, allow, or require
• --organization-require-behavior — no_prompt, pre_login_prompt, or post_login_prompt
• --organization-discovery-methods — comma-separated list of email, organization_name

The flags are additive and non-breaking, and follow the existing optional-flag pattern used by --third-party-security-mode and --redirection-policy:

• On create, each field is sent only when the flag is provided.
• On update, a field is sent only when its flag is set, so unset flags never clobber existing values.

Example:

auth0 apps create --name myapp --type regular \
  --organization-usage require \
  --organization-require-behavior pre_login_prompt \
  --organization-discovery-methods email,organization_name

🔬 Testing

Verified end-to-end against a live tenant: create sends all three fields; update of an unrelated field preserves org values; updating a single org field changes only that field; invalid values and the API's pre_login_prompt dependency surface as clean 400 errors. Existing unit tests pass via make test-unit, and docs were regenerated with make docs.

📝 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)