Use mill examples in init #635

Job	Run time
test-docs	7m 45s
build-windows / run	5m 4s
build-linux / run	3m 33s
compiler-bridge / run	1m 9s
lint-autofix / run	52s
itest (11, ci/test-mill-dev.sh && ci/test-mill-release.sh && ./mill -i -k __.ivyDepsTree && ./mil... / run	34s
itest (17, ci/test-mill-bootstrap.sh) / run	1m 34s
linux (11, '{scalajslib,scalanativelib,kotlinlib}.__.testCached') / run	14m 53s
linux (11, 'example.{depth,extending}.__.local.testCached') / run	43s
linux (11, 'integration.{failure,feature,ide}.__.local.testCached') / run	57s
linux (11, 'example.thirdparty[{mockito,acyclic,commons-io}].local.testCached') / run	51s
linux (17, '{main,scalalib,testrunner,bsp,testkit}.__.testCached') / run	8m 33s
linux (17, 'example.javalib.__.local.testCached') / run	45s
linux (17, 'example.kotlinlib.__.local.testCached') / run	57s
linux (17, 'example.scalalib.__.local.testCached') / run	53s
linux (17, 'example.thirdparty[{fansi,jimfs,netty,gatling}].local.testCached') / run	46s
linux (17, 'integration.invalidation.__.server.testCached') / run	1m 37s
linux (17, 'integration.invalidation.__.fork.testCached') / run	1m 38s
linux (17, contrib.__.testCached) / run	4m 53s
windows (11, "example.scalalib.{basic,web}.__.fork.testCached") / run	3m 21s
windows (11, 'integration.invalidation[_].server.testCached') / run	3m 16s
windows (11, contrib.__.testCached) / run	13m 7s
windows (11, "{main,scalalib,bsp}.__.testCached") / run	13m 4s
windows (17, 'integration.{feature,failure}[_].fork.testCached') / run	4m 24s
	1h 35m 9s

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