chore: update for meeting alert

[NotNestor]

Description

• Add meeting alert tokens
• Add unit tests

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots:

Before (If applicable):

After:

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation update
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Other... Please describe:

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.29630% with 1 line in your changes missing coverage. Please review.

Project coverage is 94.74%. Comparing base (39ae84c) to head (563d6b0).

Files	Patch %	Lines
.../src/components/date-time-picker/DateTimePicker.ts	90.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1689 +/- ## ========================================== - Coverage 94.81% 94.74% -0.07% ========================================== Files 134 134 Lines 19505 19516 +11 Branches 3065 3060 -5 ========================================== - Hits 18493 18491 -2 - Misses 1012 1025 +13 ```

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