feat(sdk-core): implement EdDSA MPCv2 external signer orchestrator #2577

Job	Run time
Generate merge base API spec	7m 8s
Generate head API spec	6m 19s
Check specs identical	4s
Generate vacuum reports for API spec	0s
API Spec Check	3s
Linter Override	-1s
Check breaking changes	-1s
	13m 32s

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