Add capability to manage multiple printers in one instance

[DutchmanNL]

Currently multiple instances are needed to manage multiple printers, each instances requires in basic 40 - 60 mb ram for basic resources.
Adding the capability to have multiple printers in 1 instance safes 40-60 mb for each connection

Implementation will follow example of ESPHome:

• integrate table as overview of printer
• buttons do add/remove/modify printer connection attributes