NodeJs: add missing utxo routes

[Alex6323]

• NodeJs binding: Adds GetOutputMetadata and GetOutputWithMetadata;

Also contains other fixes and doc alignments that were missed in #1928:

• postBlockRaw now receives the bytes from binding side
• GetRewards was renamed to GetOutputManaRewards
• The NodeJs binding still lacked some Raw methods;
• Some actual optional values weren't properly typed;
• The NodeJs binding docs weren't fully aligned yet;
• transaction-failure-reason.ts wasn't exported;
• Removes the getNetworkInfo method (bc there is getProtocolParameters)