Added telemetry

[michaelshin]

• Based on VSCode Extension Telemetry API, DeepView only asks for users to opt into telemetry
  • https://code.visualstudio.com/api/references/vscode-api#TelemetrySender
  • https://code.visualstudio.com/api/references/vscode-api#TelemetryLogger
• Added document on what data is collected by CentML and how to opt-out
• Added precompile directives to ensure that during development we only print out the data and do not pollute the data collection.
• Updated build scripts to use esbuild script instead of CLI so it is more easily configurable

[anurlybayev]

Can you please link to relevant documentation related to VSCode Extension Telemetry API?

[michaelshin]

Here are the links to relevant interfaces:

• https://code.visualstudio.com/api/references/vscode-api#TelemetrySender
• https://code.visualstudio.com/api/references/vscode-api#TelemetryLogger

[codeclimate]

Code Climate has analyzed commit 874ad0d and detected 1 issue on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	1

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[jimgao1]

LGTM!