WIP Branch SDK V2

[bitbeckers]

• Auto generate API client using Orval
• Moved generated Graph client types to __generated dir
• Init client using environment instead of chainId
• ReadOnly mode when there's no wallet client or the wallet client is part of a different environment
• Updated tests
• Add metadata queries to graphql
• Release 2.0.0-alpha.18

Closes:

• #1322
• #1323
• #1324
• #1325
• #1321