feat: mdv2 webcomponent theme

[NotNestor]

Add a new theme mdv2 to the web components. Update the theme provider to accept a theme name Add boilplate theme tokens to all components in the mdv2 theme

Description

Add a new attirbute for theme to the theme provider. This can set momentum/lumos/momentumV2 If these are not set fall back to previous logic (lumos true/false)

Update scripts for this new theme. To make this build correctly add placeholder files based on the lumos theme that will be updated to correct tokens dark-complete and light-complete on the momentum-design/tokens repo

New design will be based on components in the following figma

https://www.figma.com/design/9qhjTsC97Q3W8ZsbnTiZho/%F0%9F%A7%A9-[WIP]-Momentum-Global-Web-Library-Components?node-id=7709-473920&t=jI7xDYJ4UpMUVLqS-0

Related Issue

CX-15052 CX-15051 CX-15050

Motivation and Context

This is introducing a new theme MomentumV2 to the web-component library

How Has This Been Tested?

Existing tests pass and new theme has been tested in the sandbox and storybook

Screenshots:

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] 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:

• [x] 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.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[NotNestor]

Depends on https://github.com/momentum-design/momentum-design/pull/636

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.47%. Comparing base (4bb1c89) to head (5443002).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1647 +/- ## ========================================== + Coverage 94.42% 94.47% +0.04% ========================================== Files 134 134 Lines 19412 19414 +2 Branches 3023 3031 +8 ========================================== + Hits 18330 18341 +11 + Misses 1082 1073 -9 ```

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