feat: expose onSignature callbacks for eth_signTypedData_v4 requests (#537)

* feat: expose onSignature related callbacks for eth_signTypedData_v4 request

* feat: add onMissingSigner callback to useFrame_unstable hook (#538)

Author: normanzb

.changeset/chilled-spies-vanish.md

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+---
+"@frames.js/render": patch
+---
+
+feat: add onMissingSigner callback to useFrame_unstable

.changeset/clean-seas-sort.md

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+---
+"@frames.js/render": patch
+"docs": patch
+---
+
+feat: expose onSignature callbacks for eth_signTypedData request from server

.changeset/strange-oranges-count.md

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+---
+"@frames.js/render": patch
+---
+
+feat: expose onSignature callbacks for eth_signTypedData request from server