feat(server): role based authentication system (#2434)

- Parse toml configuration file, see https://github.com/qdm12/gluetun-wiki/blob/main/setup/advanced/control-server.md#authentication
- Retro-compatible with existing AND documented routes, until after v3.41 release
- Log a warning if an unprotected-by-default route is accessed unprotected
- Authentication methods: none, apikey, basic
- `genkey` command to generate API keys

Co-authored-by: Joe Jose <45399349+joejose97@users.noreply.github.com>

internal/server/logger.go

@@ -1,8 +1,10 @@
 package server
 
 type Logger interface {
+	Debugf(format string, args ...any)
 	infoer
 	warner
+	Warnf(format string, args ...any)
 	errorer
 }