chore: add retry configuration options for http requests

[duyhungtnn]

#199
This pull request introduces a robust and configurable retry mechanism for HTTP requests, including support for the Retry-After header, exponential backoff with jitter, and comprehensive configuration validation and defaults. It also adds extensive unit tests to ensure correct parsing and propagation of retry-related logic throughout the codebase.

Retry logic and error handling improvements:

• Added a new promiseRetriable utility in src/utils/promiseRetriable.ts that provides generic, configurable retry logic with exponential backoff and jitter, as well as logic to respect the Retry-After header and classify retryable errors and status codes.
• Enhanced the InvalidStatusError class in src/objects/errors.ts to include an optional retryAfterMs property, and added a parseRetryAfter function to parse both delta-seconds and HTTP-date formats from the Retry-After header.
• Updated the HTTP client in src/api/client.ts to parse the Retry-After header from error responses and propagate it via InvalidStatusError, ensuring that retry logic can use this information. [1] [2]

Configuration and validation:

• Introduced new retry-related configuration options (maxRetries, retryInitialInterval, retryMaxInterval) to the BKTConfig interface in src/config.ts, with sensible defaults and validation logic to handle negative or inconsistent values. [1] [2] [3] [4] [5]
• Updated test configuration helpers and conversion logic to reflect and test these new retry options. [1] [2] [3]