add prisma and compodoc icon

[dotprestto]

I added the Prisma Icon for .prisma extension. I tried my best do match one of the colors in the Prisma website. The icon I used is this one.

This closes #36.

[dotprestto]

Also added Compodoc config files support. Works for .compodocrc, .compodoc.json, .compodocrc.yml, .compodocrc.yaml.

Also also added some Nest Icons in my fork, sorry for the mess xD

[BeardedBear]

Thanks for the PR!

I'm just making adjustments to the suggested icons on my end, I'll be pushing them out shortly:

• Some of the colors for the nest icons were not readable enough
• The prisma icon had its right border too thin
• the compodoc icon is not really an SVG, but a PNG file (base64) encapsulated in an SVG, and has too many different colors