Additions to the Server Manager

[macarooni-man]

• [x] Right click menu on servers in the server manager to start/stop/restart them
• [ ] Add support for proxies (Waterfall/Velocity)
• [x] Add support for Purpur
• [ ] Add support for Quilt
• [ ] Add support for Neoforge
• [ ] Add a search bar and enable/disable all buttons to both the Add-on Manager and Script Manager
• [x] Add an input to inject custom JVM arguments (not RAM though)
• [ ] Improve the network button at the top of the screen to include the WAN, LAN, and Geyser IP address
• [ ] #42
• [ ] Install Geyser asynchronously to prevent the UI from freezing when enabled after the server is created
• [ ] Create a menu to modify gamerules (changes by version, figure out a way to retrieve this consistently)
• [x] Pre-configure geyser to enable clone-remote-port: true in config.yml
  • [x] Possibly use Geyser/Bukkit startup flags to pre-generate the config
  • [ ] If geyser is enabled, add an input to change the geyser port
  • [ ] Show Geyser networking configuration in amscript's server.geyser_port
• [x] Return to main menu when a server is deleted and none exist
• [x] Show build number in restore back-up screen