feat: alerts for acceptance of specific agreements.

[xitij2000]

Description

This PR introduces two generic component for gating features behind accepting user agreements.

• An Alert component to display details of the agreement to be accepted
• A wrapper component to place around gated content that will disable the functionality till the agreement is accepted.

This will work with the API introduced in openedx/openedx-platform#35895

Supporting information

openedx/platform-roadmap#465

Testing instructions

Same as openedx/openedx-platform#35895

Other information

Best Practices Checklist

We're trying to move away from some deprecated patterns in this codebase. Please
check if your PR meets these recommendations before asking for a review:

• Any new files are using TypeScript (.ts, .tsx).
• Avoid propTypes and defaultProps in any new or modified code.
• Tests should use the helpers in src/testUtils.tsx (specifically initializeMocks)
• Do not add new fields to the Redux state/store. Use React Context to share state among multiple components.
• Use React Query to load data from REST APIs. See any apiHooks.ts in this repo for examples.
• All new i18n messages in messages.ts files have a description for translators to use.
• Avoid using ../ in import paths. To import from parent folders, use @src, e.g. import { initializeMocks } from '@src/testUtils'; instead of from '../../../../testUtils'

[openedx-webhooks]

Thanks for the pull request, @xitij2000!

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[codecov]

Codecov Report

❌ Patch coverage is 98.93617% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 95.38%. Comparing base (5672644) to head (bfb1e49).

Files with missing lines	Patch %	Lines
...ement-gated-feature/AlertAgreementGatedFeature.tsx	96.42%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2845   +/-   ##
=======================================
  Coverage   95.37%   95.38%           
=======================================
  Files        1332     1336    +4     
  Lines       30594    30679   +85     
  Branches     6925     6928    +3     
=======================================
+ Hits        29178    29262   +84     
+ Misses       1359     1348   -11     
- Partials       57       69   +12     

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