rust

Revise and reorganize "Why the Component Model?" section #55

Job	Run time
build (component-model/examples/example-host)	1m 50s
build (component-model/examples/tutorial/adder, component)	18s
build (component-model/examples/tutorial/calculator, component)	15s
build (component-model/examples/tutorial/command, component)	23s
	2m 46s

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