Overhaul SimDeck documentation for usage-focused guidance #273

Job	Run time
Client lint, build, and tests	31s
Build integration artifacts	1m 47s
Packages and VS Code extension	25s
Rust lint and unit tests	1m 26s
Android emulator integration	6m 29s
JS API simulator integration	6m 4s
CLI simulator integration	9m 48s
	26m 30s

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