IBP VS CodeREADME should guide user when using Typescript sample contracts (ie non-generated)

[mahoney1]

Add instruction to README for existing (not generated) TS contracts, like in fabric samples to install dependencies else packaging an open TS contract will err. One of those is typescript to transpile to javascript.

Description

Its obvious to most TS developers to install dependencies for their project, but for (say) TS newbies using Fabric Samples(like Fabcar) in the extension (and/or where they've used Javascript contracts prior) they might need a 'steer'. In discussions, deemed best place for this might be to add to (README)[https://github.com/IBM-Blockchain/blockchain-vscode-extension/]

If opening an existing TS project, the user is required to do an npm install manually first to install dependencies mentioned, such https://github.com/hyperledger/fabric-samples/blob/release-1.4/fabcar/typescript/package.json - in some tutorials, this may already be instructed, but if the IBP extension can mention this, in relation to packaging, it improves the 'lot' of developers / user experience and lets them package contract successfully.

Expected Behavior

Indicate in README they will need to have typescript dependencies installed (in package.json) eg. using npm install, before attempting to package S/C

Actual Behavior

Smart contract has errors, please fix.

Possible Fix

Steps to Reproduce

Existing issues

• Stack Overflow issues
• GitHub Issues

Log File

Your Environment

• IBM Blockchain Platform Extension Version:
• Visual Studio Code version:
• Environment name and version (e.g. Node.js v8.12.0, npm v6.4.1):
• Operating System and version:
• Link to your project:

[jt-nti]

See #3183