[anodized] docs: update intro #763

Job	Run time
Check formatting	13s
Lint and smoke-test fuzz targets	1m 55s
Lint and test anodized-fmt	27s
Lint and test anodized-logic	31s
Lint test-util	21s
Lint and test anodized-core	22s
Lint and test anodized with cfg ``	37s
Lint and test anodized with cfg `--config 'build.rustflags=["--cfg","anodized_panic"]'`	41s
Lint and test anodized with cfg `--config 'build.rustflags=["--cfg","anodized_print"]'`	39s
Lint and test anodized with cfg `--config 'build.rustflags=["--cfg","anodized_discard_specs"]'`	37s
	6m 23s

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