Release/838.0.0

[jiexi]

Explanation

Releases @metamask/eip-5792-middleware

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Low Risk
This is a version/changelog-only release PR with no code logic changes; risk is limited to consumers adopting the new major version.

Overview
Bumps the monorepo version to 838.0.0 and publishes @metamask/eip-5792-middleware as 3.0.0.

Updates the @metamask/eip-5792-middleware changelog to add a 3.0.0 release section and adjusts compare links accordingly.

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