feat(devtools): use wallAgent to replace disposable bridge

[Asuka109]

Summary

No longer treat the react devtools bridge as a globally shared singleton object, but rather as disposable to avoid events triggered after bridge closed.

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Checklist

• I have added changeset via pnpm run change.
• I have updated the documentation.
• I have added tests to cover my changes.

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Latest commit: 90a15f3

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