feat: remove build step from ui 👷‍♀️

[ramiAbdou]

Description ✏️

Closes #19.
Closes #22.

This PR does the following:

• Refactors the following ui components to no longer use SCSS/PostCSS and instead uses Tailwind:
  • Checkbox
  • Dropdown
  • Modal
  • Radio
  • Select
  • Toast
• Removes the build step from ui, including any packages that were needed for the build process such as rollup and all of its plugins.
• Moved ui components from the src/ui folder to the src/components folder.
• Configures the prettier-plugin-tailwindcss properly by updating the Prettier configuration.
• Creates a new @oyster/tailwind package that houses the base Tailwind configuration, pointing to all React component files for Intellisense + Prettier purposes. Our FE applications will extend this base configuration and simply just update the content property.
• Adds keyframe animations that previously lived in SCSS to the base Tailwind config.
• Updates the Tailwind Intellisense VSCode extension by updating the experimental.configFile to the newly established base Tailwind config.
• Added moduleResolution: "Bundler" to the core package.
• Refactors findMemberByEmail since it started giving issues when updating the above.

Type of Change 🐞

• Feature - A non-breaking change which adds functionality.
• Fix - A non-breaking change which fixes an issue.
• Refactor - A change that neither fixes a bug nor adds a feature.
• Documentation - A change only to in-code or markdown documentation.
• Tests - A change that adds missing unit/integration tests.
• Chore - A change that is likely none of the above.

Checklist ✅

• I have done a self-review of my code.
• I have manually tested my code (if applicable).
• I have added/updated any relevant documentation (if applicable).