Add ibc source badge to asset icons

[grod220]

At the moment, minifront indiscriminately displays the asset icon provided by the prax asset registry in the ValueViewComponent. Example:

The challenge is that this can mislead users. For example, Penumbra can connect to multiple Cosmos chains that each may have a Bitcoin variation using the same Bitcoin icon. For users, it would be impossible to distinguish them in the UI. There should be a way for frontends to be able to label assets depending on the channel source, so it's clear to users where it is coming from.

Task: Add a badges field to the Metadata proto that allows the registry to add the ibc chain icon to the asset's badge list.

Steps:

1. Update the Metadata proto in penumbra-zone/penumbra to include a new badges field (type: ~Vec<Image>)
2. Pull in latest proto defs to registry. Add the chain icon to the respective ibc asset's metadata. Regenerate registry and ship new version of registry npm package.
3. Pull in latest proto defs to minifront. Update to latest registry package. Update ValueViewComponent to show badge on top of icon.

[hdevalence]

The rendering should be a circle 1/2 of the radius of the main icon (so 1/4 the area) and placed in the lower right quadrant, aligned with the edge of the icons:

[hdevalence]

xref prax-wallet/registry#97 for proposed policy -- this shouldn't apply to all assets, just bridged ones