Project pages with Mystic integration

This MR implements the new feature of project pages on the site, pulling data from Mystic to display information and metrics. Includes a searchable and filterable grid of projects to browse through.

REMAINING TO DO:

• finalize real project information (@me1) (resolve all NOLSKI-PLACEHOLDERs)
• validate that searching and filtering works with finalized project information
• replace Lorem Ipsum paragraph on the projects grid page
• change API URL to use production Mystic (ideally configurable or auto-switching?)
• finalize project grid styles
• finalize resource list styles (for now)
• replace experimental aspect-ratio CSS style with something currently standard
• get feedback from designers
• complete any remaining TODOs in the code (excluding navigation TODOs)
• extinguish any inevitable fires (Mystic embeds on Firefox fixed)

EXTERNAL TO DO:

• get projects created on Mystic (@me1)

OTHER NOTEWORTHY CHANGES:

• the old fellows table with names and projects has been removed
• compatibility with GitHub Pages has been restored (in theory)
  • front matter can no longer use templating again, any features that depended on it have been removed
• the member grid components have been unified into a single component with different "modes"
• the fellows data has been expanded with new information and fellows headshots have been added
• a new component, the checkbox dropdown, has been added and is agnostic to the projects features and JS entirely
• a new component, the faculty info block, has been added for showing faculty info in RIT style
• the summit page has been removed, but its navigation link has been left intact for redirect to the new page
• the site will default to using the live Mystic URL for the projects API, but can use local Mystic instance by setting JEKYLL_ENV=local_mystic as an environment variable