TypeScript rewrite

[barrymun]

• completed proposed rewrite to TS
• tested (to the best of my knowledge)
• setup config, tooling (pre-commit hooks, linting, etc.), setup webpack

[barrymun]

@chris-mosley this would convert the repo to use TS (better tooling and testing), and set up the project so that in the future a chromium extension could also be easily created

to test:

• checkout the branch with these changes
• install libs: run yarn install
• build: run yarn build (this will create a dist directory at the root level)
• install add-on as a temporary one (might be best to remove the current add-on of AmazonBrandFilter if it's currently installed
• select any file in the dist directory
• the extension should work as it it does now

the code has been altered as little as possible. some conversions have been made to suppress TS warnings, and i've made some small changes where bugs may have occurred.

please let me know if there are any issues or if any of the above is unclear.

[chris-mosley]

Alright got this working. I'll need to make some modifications to the build but overall seems to generate mostly what i had before.