build: enforce sort-imports eslint rule

[aryanshridhar]

Adds the sort-import rule in codebase.

Summary -

• Added the sort-import rule in eslint. However, it lacks the feature of auto fixing changes using eslint --fix. Hence, this is where eslint-plugin-import helps us! (It also provides better control on how imports are sorted)
• This requires eslint-import-resolver-typescript to resolve imports in typescript files.
• Added a new command lint:js which sort the imports in .js files.
• Ran yarn lint which autofixes all the problems for us :)

Rules kept off -

• import/no-named-as-default-member
• import/namespace

Edit: This can be merged once large pending pull requests are merged first - to avoid large merge conflicts :)

[coveralls]

Coverage remained the same at 92.508% when pulling ae12de0 on aryanshridhar:Add-EslintImportOrder into d77d3ac on electron:main.

[BlackHole1]

It would have been better if some details had been optimized. 😀

[BlackHole1]

LGTM. 👍