fix: detect remote static attachments in chat

[giwaov]

Summary

• fix xmtp.chat remote attachment detection to use the canonical
  emoteStaticAttachment\ content type
• add regression coverage so remote static attachments remain actionable

Fixes #1463

Testing

• git diff --check
• git diff --cached --check
• Not run: \yarn workspace @xmtp/xmtp.chat test apps/xmtp.chat/src/helpers/messages.test.ts\ because Yarn reports the checkout is missing its node_modules state file; prior \yarn install --immutable\ attempts in this checkout hung before creating
  ode_modules.

Note

Fix isRemoteAttachment to detect remote static attachments in chat

Corrects a typo in messages.ts where the contentType.typeId was compared against 'staticRemoteAttachment' instead of the correct value 'remoteStaticAttachment'. Adds a test to verify that isRemoteAttachment and isActionable both return true for a properly constructed remote attachment message.

^{Macroscope summarized deb8517.}

[changeset-bot]

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Latest commit: deb8517

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