[DOCS-2595] Reorganize JS driver README

[jrodewig]

Ticket(s): DOCS-2595

Problem

The current JavaScript driver README introduces concepts in a somewhat confusing order. It also has some minor grammar/styling issues.

Solution

• Reorganizes and reorders the README into install, usage, and configuration sections
• Removes the Connecting from the browser and Importing into a bundled project sections. These are redundant and already covered.
• Adds console.log(...) to a few code snippets.
• Makes minor grammar/styling fixes

Out of scope

• Overhauling the client configuration section. We can likely simplify this into a table.
• Documenting all supported types for TypeScript

Testing

I tested all updated snippets

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[cleve-fauna]

Thanks James!