Added example plugins: Counter, Console, Ping
Changes to be committed:
modified: .gitignore
modified: README.md
new file: compiled/counter.wasm
new file: compiled/ping.wasm
new file: console/LICENSE
new file: console/README.md
new file: console/esbuild.js
new file: console/package-lock.json
new file: console/package.json
new file: console/src/index.d.ts
new file: console/src/index.js
new file: counter/LICENSE
new file: counter/README.md
new file: counter/esbuild.js
new file: counter/package-lock.json
new file: counter/package.json
new file: counter/src/index.d.ts
new file: counter/src/index.js
new file: ping/LICENSE
new file: ping/README.md
new file: ping/esbuild.js
new file: ping/package-lock.json
new file: ping/package.json
new file: ping/src/index.d.ts
new file: ping/src/index.js