20 ICPAbout $800 Bounty for Developer web3

20 ICPs, with 10 ICPs bonus for docs site
task: @Astrox_Network's "agent_dart" api doc
link:https://github.com/AstroxNetwork/agent_dart/issues/13

Acceptance Criteria:
[comment on code to cover all apis]
[generate dart docs]
[optional generate gitbook or github pages]
[optional tutorial/docs site for developers]

Context:
To have better understanding of internet computer, for client developers, it is the best way to understand how the sdk works.

Though we have ported most agent-js features to agent_dart, we don't have enough resources to complete the api docs. Which is really important work for community developers.

Thus, we need to cover as many apis as possible, we need someone to comment on code like we do for dart code.