[eas-cli] Add eas update:view-embedded command

[gwdp]

Why

Follow-up to eas update:upload-embedded — lets operators inspect a registered embedded update by UUID without opening the dashboard. Pairs with the universe B11 embeddedUpdates.byId query.

Ref ENG-21033

How

• New eas update:view-embedded <id> command; positional arg is the embedded update UUID
• New EmbeddedUpdateQuery.viewByIdAsync wrapping the embeddedUpdates.byId GQL query
• appId is derived from project context, so ownership is validated server-side
• Outputs formatted fields (ID, platform, runtime version, channel, created at) or --json

Test Plan

• yarn tsc — no errors
• yarn lint — 4 pre-existing GQL errors (B11 schema not yet merged to universe main); no new errors

[gwdp]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• [eas-cli] Add eas update:list-embedded command #3722
• [eas-cli] Add eas update:view-embedded command #3721 👈 (View in Graphite)
• [eas-cli] Add eas update:upload-embedded command #3720
• main

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[github-actions]

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[linear]

ENG-21033