feat(examples): add simple userbook realm (#1949) #97

Job	Run time
build (1.21.x, GOARCH=amd64 GOOS=linux, gno)	12s
build (1.21.x, GOARCH=wasm GOOS=js, gno)	26s
test (1.21.x, _test.cmd)	1m 12s
build (1.22.x, GOARCH=amd64 GOOS=linux, gno)	32s
test (1.21.x, _test.pkg)	34s
build (1.22.x, GOARCH=wasm GOOS=js, gno)	30s
test (1.21.x, _test.gnolang.native)	25s
test (1.21.x, _test.gnolang.stdlibs)	52s
test (1.21.x, _test.gnolang.realm)	29s
test (1.21.x, _test.gnolang.pkg0)	1m 50s
test (1.21.x, _test.gnolang.pkg1)	6m 27s
test (1.21.x, _test.gnolang.pkg2)	4m 1s
test (1.21.x, _test.gnolang.other)	23s
test (1.22.x, _test.cmd)	1m 22s
test (1.22.x, _test.pkg)	46s
test (1.22.x, _test.gnolang.native)	33s
test (1.22.x, _test.gnolang.stdlibs)	57s
test (1.22.x, _test.gnolang.realm)	39s
test (1.22.x, _test.gnolang.pkg0)	1m 56s
test (1.22.x, _test.gnolang.pkg1)	6m 23s
test (1.22.x, _test.gnolang.pkg2)	4m 6s
test (1.22.x, _test.gnolang.other)	27s
upload-coverage	8s
	35m 10s

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