chore(examples): add examples (#507) #1

Job	Run time
Jco Build	2m 58s
ESLint	1m 10s
WASI Test Generation	3m 52s
Rustfmt	8s
Test Workspaces	56s
Jco Test Suite (ubuntu-latest, 18.x)	3m 51s
Jco Test Suite (ubuntu-latest, 20.x)	4m 38s
Jco Test Suite (ubuntu-latest, latest)	2m 53s
Jco Test Suite (windows-latest, 20.x)	5m 1s
Jco Test Suite (macos-latest, latest)	4m 52s
Jco Deno WASI Conformance Tests	1m 38s
Jco Node.js WASI Conformance Tests (ubuntu-latest, 18.x)	2m 13s
Jco Node.js WASI Conformance Tests (ubuntu-latest, 20.x)	2m 17s
Jco Node.js WASI Conformance Tests (ubuntu-latest, latest)	1m 57s
Jco Node.js WASI Conformance Tests (windows-latest, latest)	2m 3s
Jco Node.js WASI Conformance Tests (macos-latest, latest)	2m 14s
	42m 41s

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