Add per-endpoint cluster state management to importer.

package.json

src-electron/db/query-config.js

src-electron/importexport/import-isc.js

src-electron/rest/user-data.js

test/resource/generation-test-file-1.zap

test/resource/isc/ha-door-lock.zap

test/resource/isc/test-light.zap

test/resource/save-file-1.zap

test/resource/save-file-2.zap

test/resource/save-file-test-regen.zap

test/resource/test-light.zap

test/resource/three-endpoint-device.zap

test/resource/tokens-test.zap