Restructure & align docs.rddl.io

[eckelj]

• [ ] remove approval process
• [ ] remove supported hardware section and replace it by energy agent (also the links)
• [ ] Trust Wallet used for Validators
• [ ] rephrase and Connecting your machine to the network
• [ ] remove Tasmota Nodes from the Types of Nodes
• [ ] rephrase Welcome to RDDL Newtork & sub pages
• [ ] rephrase actors
• [ ] participation: energy agent || nodes
• [ ] remove compatibility requirements
• [ ] remove is my hardware supported
• [ ] remove hw approval process
• [ ] strip down getting connected to the bare minimum: no flashing, no firmware stuff... single out the connecting machien to the networ part that is still used by the energy agent