feat(import): support Google Takeout Gemini Apps activity exports #394

Job	Run time
run / frontend-node-25	2m 46s
run / docs	32s
run / Go Test (ubuntu-latest)	7m 31s
run / integration	2m 13s
run / scripts	8s
run / Go Test (race detector)	9m 16s
run / Go Test (windows-latest)	24m 27s
run / Desktop Unit Tests (Windows)	3m 50s
run / frontend	2m 58s
run / lint	7m 31s
run / e2e	6m 44s
	1h 7m 56s

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