docs: update all docs to reflect code and conform to a standardized convention

[Slug-Boi]

Dev Docs

• [x] Dev Conventions
• [x] Fetcher
• [x] Frontend_styling
• [x] Frontend_thoughtworks_javascript
• [x] Merger_strats
• [x] Merger
• [ ] Pipeline
• [x] Verifier

  User Docs

• [x] add usage
• [x] remove usage
• [x] Fetcher usage
• [x] Generate usage
• [x] Merger usage
• [x] Quickstart
• [x] Specfile format

[Alex-itu]

The quickstart has been updated with the feedback from the testing. So it's done from that perspective.

Frontend_styling has been added with explanations to image paths in the CSS.

javascript.md has been renamed to Frontend_thoughtworks_javascript.md and has been updated with improved dev documentation.

[Slug-Boi]

The pipeline documentation is not up to date thus this issue will remain open