feat: added recaptcha verification pipeline step

[AhtishamShahid]

This pull request introduces reCAPTCHA validation for user registration in the edx_filters_pipelines package. The main changes include adding a new registration form field for the CAPTCHA token, implementing a filter pipeline step to verify the token using Google Cloud's reCAPTCHA Enterprise SDK, and supporting configuration via Django settings and waffle flags. Several new dependencies are added to enable this functionality.

New reCAPTCHA registration feature:

• Added CaptchaForm in edx_filters_pipelines/auth/form.py to expose a captcha_token field for registration, allowing dynamic enable/disable via settings.
• Implemented VerifyReCaptchaToken pipeline step in edx_filters_pipelines/auth/pipelines/registration.py to verify the reCAPTCHA token during registration, raising a validation error if verification fails.
• Created edx_filters_pipelines/auth/utils.py with the RecaptchaVerifier class and utility functions to verify tokens using the Google Cloud SDK, supporting platform-specific site keys and handling errors gracefully.

Feature toggling and configuration:

• Added ENABLE_RECAPTCHA_VALIDATION waffle flag in edx_filters_pipelines/waffle.py to allow dynamic enabling/disabling of reCAPTCHA validation.

Version bump:

• Bumped package version to 1.1.0 in edx_filters_pipelines/__init__.py to reflect new feature addition.

[Copilot]

Pull Request Overview

This PR introduces reCAPTCHA validation for user registration using Google Cloud's reCAPTCHA Enterprise SDK. The implementation includes a new registration form field for CAPTCHA tokens, a filter pipeline step to verify tokens during registration, and supporting configuration via Django settings and waffle flags.

• Added CaptchaForm to expose a captcha_token field for registration with dynamic enable/disable capability
• Implemented VerifyReCaptchaToken pipeline step for token verification during registration
• Created utilities for reCAPTCHA verification using Google Cloud SDK with platform-specific site keys and error handling

Reviewed Changes

Copilot reviewed 14 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
requirements/base.in	Added new dependencies for reCAPTCHA functionality
requirements/*.txt	Auto-generated dependency files reflecting new packages
edx_filters_pipelines/waffle.py	Added waffle flag for enabling/disabling reCAPTCHA validation
edx_filters_pipelines/auth/utils.py	Core reCAPTCHA verification logic using Google Cloud SDK
edx_filters_pipelines/auth/pipelines/registration.py	Pipeline step for reCAPTCHA token verification during registration
edx_filters_pipelines/auth/form.py	Registration form extension with CAPTCHA token field
edx_filters_pipelines/init.py	Version bump to 1.1.0

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