Release 975.0.0

[mikesposito]

Explanation

Releasing new minor version of @metamask/network-controller

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
Primarily version and dependency bumps plus changelog updates; functional risk is limited to any downstream impact from consuming @metamask/network-controller@31.1.0.

Overview
Publishes @metamask/network-controller v31.1.0, documenting the new exported types AddNetworkCustomRpcEndpointFields and InfuraRpcEndpoint.

Updates the monorepo release version to 975.0.0 and bumps all affected workspace packages (and yarn.lock) to depend on @metamask/network-controller ^31.1.0, with corresponding CHANGELOG.md entries.

^{Reviewed by Cursor Bugbot for commit 0049bb6. Bugbot is set up for automated code reviews on this repo. Configure here.}

[metamaskbotv2]

✅ No changelog changes needed.