feat(sdk-core): implement EdDSA MPCv2 external signer orchestrator #2636

Job	Run time
Generate head API spec	8m 8s
Generate merge base API spec	8m 39s
Check specs identical	6s
Check breaking changes	-1s
Generate vacuum reports for API spec	-1s
API Spec Check	3s
Linter Override	-1s
	16m 53s

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