Mainnet readiness: user/consumer experience

[cwgoes]

Objective:

• Ensure that users of Namada (through the CLI and SDK provided in this repository) have a consistent, reliable experience, where all desired features are provided.
• Investigate, understand, and address all user-submitted reports of undesired or unexpected behaviour.
• Ensure that the CLI and SDK interfaces are consistent and reasonably future-proof.
• Stabilize the CLI and SDK interfaces so that external scripts and code can start to rely on them.
• Ensure that the Ledger application is correct and complete for the current Namada core protocol.

Dependencies:

• [x] https://github.com/anoma/namada/issues/88
• [x] https://github.com/anoma/namada/issues/67
• [x] https://github.com/anoma/namada/issues/50
• [ ] https://github.com/anoma/namada/issues/2025
• [x] https://github.com/anoma/namada/issues/2513
• [ ] #2664
• [x] #2673
• [x] #2771
• [ ] (more pending CLI structure discussion)

[cwgoes]

Switched to project boards for planning purposes.