BREAKING - NetworkInfo new field: rpc_url

[Szegoo]

We need to know the RPC URL of the blockchains we intend to communicate with.

Removed name and ss58_prefix from NetworkInfo since it is possible to query them from the RPC.

Added a new field, account_type, this is needed when sending XCM messages.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.30 🎉

Comparison is base (350c55c) 88.76% compared to head (a6c83f8) 89.06%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #66      +/-   ##
==========================================
+ Coverage   88.76%   89.06%   +0.30%     
==========================================
  Files           6        6              
  Lines         623      631       +8     
==========================================
+ Hits          553      562       +9     
+ Misses         70       69       -1     

Impacted Files	Coverage Δ
contracts/identity/lib.rs	97.12% <100.00%> (+0.74%)	⬆️
contracts/identity/tests.rs	98.62% <100.00%> (+0.02%)	⬆️

... and 6 files with indirect coverage changes

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[Szegoo]

Let's not merge this yet, we might actually need the name field.

[Szegoo]

@cuteolaf It is possible to get the name and the parachainId of a network from an RPC: https://substrate.stackexchange.com/a/9093/2163
If all the changes look good to you we can merge this.