feat: add OIDC token validation and enhance retry reliability

- Add new oidc-token-validate: command not found input parameter for optional token validation
- Split retry logic to handle token creation and validation separately
- Implement exponential backoff with jitter for all retry operations
- Migrate to consistent axios usage throughout
- Add validation check for empty tokens
- Improve error logging with detailed HTTP error context
- Add 4xx non-retryable error detection
- Increase request timeout to 30 seconds for better reliability

Author: cloudsmith-iduffy

action.yml

@@ -26,6 +26,10 @@ inputs:
     description: 'Number of retry attempts for OIDC authentication (0-10)'
     default: '3'
     required: false
+  oidc-token-validate:
+    description: 'Validate the OIDC token after authentication'
+    default: 'true'
+    required: false
   pip-install:
     description: 'Install the Cloudsmith CLI via pip'
     default: 'false'