Add tagging system for images + filtering

[Atlinx]

Add date tag for images.

Add filtering for images by a specific tag.

[Atlinx]

Right now because we are running on a static site, we cannot dynamically fetch images from a folder. Therefore we have to either:

a) Hard-code values for images into the code.
b) Number the images in from 0 to n, where n is the total number of images.

Because we need to attach tagging data, we must use method A because that ensures the image numbers aren't jumbled up when new images are added. However, instead of hard-coding names, we could have a script (python maybe?) iterate through the repo and dynamically generate a typescript file that contains an array of all the image file names.

[Atlinx]

Depends on #7