Copyover support

[Volte6]

Description

This primarily adds support for a hot reload of the binary without disconnecting telnet connected users. It will also auto-reconnect/login any webclient users.

Changes

• Added copyover admin command, along with a handler for signal: SIGUSR1 that will initiate a copyover process.
• Code can be registered with the copyover package to standardize saving/loading data that must be retained.
• Fixed/added test files, small formatting issues, javascript
• Reverted go.mod go version to 1.24
• If on https, the webclient will now connect via wss:
• Fixed a bunch of random complaints by go vet ./...
• Fixed help template rendering