Samples in TypeScript

[danhellem]

Checklist

• I have read the [contribution guidelines] (https://github.com/Azure/azure-iot-sdk-node/blob/master/.github/CONTRIBUTING.md).
• I added or modified the existing tests to cover the change (we do not allow our test coverage to go down).
• If this is a modification that impacts the behavior of a public API
  • I edited the corresponding document in the devdoc folder and added or modified requirements.

Reference/Link to the issue solved with this PR (if any)

Description of the problem

Need examples in TypeScript

Description of the solution

1. created samples/javascript directory
2. created samples/typescript directory
3. moved existing javascript files to javascript directory
4. copied some of the .js samples and converted them into .ts files. Updated coded.
5. Updated readme.md files to match new structure

I will be added more ts files, but wanted to get something out into the main repo before the PR got too large

[YoDaMa]

nit: might need to rerun lerna bootstrap --hoist to change the package-lock.json files. This will not affect anything on your side, since package-lock.json is only used for npm ci

[vishnureddy17]

LGTM