Some initial improvements

[drub0y]

This is an initial set of improvements I thought would be useful to get out of the way before I jump into any specific code updates. Highlights:

• Adds loading of environment specific .env files when present - helps with local dev at the very least
• Removes an unused aggregatorContract global variable - was moved into a local function
• Parses all non-string values once up front to prevent constant conversions - not a huge deal, but also quiets some warnings about implicit type conversions
• Adds an initial .editorconfig with some very basic whitespacing rules to ensure consistency in the codebase going forward
• Moves the ABIs out to a separate source file - these are huge and noisy, better to keep them out of the main file for ease of reading the "real" code
• Adds a start:dev npm script - this just sets the NODE_ENV which triggers the aforementioned .env specific file loading logic today

[drub0y]

Just rebased this against the updates made last night.

[drub0y]

⚠️ DO NOT MERGE YET: I've found some issues that should be addressed before this is merged ⚠️

[rasodu]

Should break this pull request into multiple pull requests(Based on features). .env file related changes would be very helpful for everyone. It would make sense to merge them while you still fix other items.

[drub0y]

This has fallen way behind at this point and we're going to make a bigger push in a future PR, so closing this one out.