feat: Add outbound example

[MatthiasGruba]

The example @mike-r-mclaughlin asked me in Slack to add here!

First contribution here so let me know if any changes are needed :)

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[nbsp]

looks good, apart from the build errors related to dependencies

[MatthiasGruba]

Ready for review again @nbsp - had to add livekit-server-sdk dependency to the examples package.json although I don't need this in my production code as it comes from @livekit/agents