Return a TxInfo struct [#1255 follow up]

[grod220]

Defining a wasm-bindgen struct allows for a simpler return value while keeping the same type signature.

Follow up from: https://github.com/penumbra-zone/web/pull/1255#pullrequestreview-2101210513

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 810622d508a962b07b45d572ddb6229f4c5716b7

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| Name | Type | | ------------------------------- | ----- | | @penumbra-zone/wasm | Patch | | chrome-extension | Patch | | @penumbra-zone/perspective | Patch | | @penumbra-zone/query | Patch | | @penumbra-zone/services-context | Patch | | @penumbra-zone/services | Patch | | minifront | Patch | | @penumbra-zone/ui | Patch | | node-status | Patch |

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[turbocrime]

thanks

[turbocrime]

however we probably shouldn't call it "txinfo" as it's too similar to the actual transactioninfo type that we have