Review and providing description for all good first issues and help want issues

[yanganto]

• Let developer easier to provide the abi json #177
• Allow to use any name for constructor function #151
• Check the toml config for sewup project setup correctly #140
• Implement #[belongs_none_or(TableName)] #134
• Doc.rs built document fail #116
• Handle many-to-many relationship #81
• Enable doc test for wasm32 target #71
• Add test for iter function of bucket #57
• Implement pop_front operation for buck #54
• Implement pop_back operation for buck #53
• Implement pop operation for buck #52
• Implement next_key operation for bucket  #51
• Implement prev_key operation for bucket  #50
• Default handle when function not exsist #42
• Add test coverage into CI flow #13