NestJS Icons - add main Filetypes to NestJS

[jerriclynsjohn]

Made essential changes to accommodate NestJS as right now icons of angular type are shown as default as both use same file naming convention, so it was essential to create a new IconType.

Main Changes made:

1. Updates the main NestJS logo color for main files (nest-cli.json, nestconfig.json ...)
2. Persistence Layer file types - blue color (dto, interfaces, entity, model, enum and repository)
3. Module file type - red color
4. Controller file type - green color
5. Service file type - yellow color
6. Decorator file type - purple color
7. Pipe file type - dark green color
8. IconType of Nest
9. Enumeration in package.json
10. Translation in all languages for NestJS entry

[jerriclynsjohn]

Do let me know if i should add more icons for nestjs framework, I'm using a customized version of this plugin. I could create another PR which has more icons.

[PKief]

@jerriclynsjohn Thank you very much, I'll take a look into your pull request, soon.

[PKief]

@jerriclynsjohn I just reviewed the pull request and it looks great. But I decided to change some things:

• renamed icon files with respect to their purpose (e.g. "nest-controller.svg")
• made icons a little bit smaller
• changed color of controller icon into "blue"
• removed icon for "interface", "entity", etc. because it's not so NestJS specific, but more a standard TypeScript file
• added more icons for "middleware", "guard", "filter" and "gateway"

The final result will look like this:

Again, thank you very much for this pull request. You did a very good job 👍