TWE dev: Add Dark Mode to Microsite

### Overview
Need to add darkmode to design system so fully compatible and accessible with all devices

### Action Items
- [x] Research dark mode for mkdocs (resources 1.01)
- [x] Add specific links from squidfunk mkdocs documentation site that are relevant to resources below (section 2)
- [ ] Add dark mode to site
- [ ] Add best practices to darkmode components to wiki (resources 1.02)

### Resources
#### Resources for creating this issue
- 1.01 https://github.com/squidfunk/mkdocs-material/discussions/2762
- 1.02 in case you need to add items to the wiki page for all software engineers https://github.com/hackforla/internship/wiki/Software-Engineer

#### Resources gathered during the completion of this issue
- 2.01 [Squidfunk: Changing the Colors](https://squidfunk.github.io/mkdocs-material/setup/changing-the-colors/)
- 2.02 [Squidfunk: Light and Dark Mode](https://squidfunk.github.io/mkdocs-material/reference/images/?h=dark+mode#light-and-dark-mode)