feat(sdk-core): implement EdDSA MPCv2 external signer orchestrator #2637

Job	Run time
Generate merge base API spec	6m 33s
Generate head API spec	6m 44s
Check specs identical	7s
Generate vacuum reports for API spec	0s
API Spec Check	6s
Check breaking changes	0s
Linter Override	0s
	13m 30s

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