#5422 feat/Add Defira connector

https://github.com/hummingbot/hummingbot/pull/5422

• Add Defira gateway connector and manual curl tests
• Add schema and validation tests for Defira config file
• Fix bug in Harmony chain which messed up gas estimates
• Add WONE74 token used by Defira testnet to sushiswap testnet file to allow manual tests to pass
• Add dependency on fixed commit of https://github.com/zuzu-cat/defira-sdk for Defira pairs and trades