[tracking] Network milestone 3 [feature-complete Namada] readiness

[cwgoes]

dependencies:

• [tracking] Network milestone 2 [MASP+IBC] readiness #2022
• [tracking] Ethereum bridge readiness #2023

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This issue tracks milestone completeness of network milestone 3, at which point users can use the MASP with tokens transferred from other chains using IBC and/or the Ethereum bridge.

Network milestone 3 is complete if and only if:

• Everything in network milestone 2 is complete.
• The Ethereum bridge fully works.
• All related code is tested, believed to be complete, and internally audited by at least two people other than the author.

Please add any dependencies that you believe are necessary to meet these requirements in the list above.

[cwgoes]

Switched to planning via project boards.