Rewrite in Vue.js and some additions

[ENK0DED]

Everything should work just like the current version, but is rewritten in Vue.js. Additions and optimizations include:

• linting & code formatting rules
• more fonts (some still unused)
• more styles, either triggered by contained words in messages or randomly (both independently configurable)
• focused on performance and memory saving for media files (mainly .avif for images without transparency, .webm for videos with transparency, .opus for audio)