Onboard to Rococo

[mrq1911]

• [x] get ROC
• [x] there is somebody to integrate with on rococo
• [x] register parachain id
• [x] create chain spec with rococo parachain id
• [x] register parathread
• [ ] deploy collators (atleast 2)
• [ ] deploy rpc node
• [ ] get us onboarded
• [ ] add rpc node to polkadot js