chore: consolidate eslint configs

[erisu]

Motivation and Context

• Centralize all configs into one file
• Create shareable ESLint config and use it throughout our repos cordova#142

Description

• Centralize Configs
• Added Apache Header to Config File.

Testing

• npm run lint

[codecov-io]

Codecov Report

Merging #109 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #109   +/-   ##
=======================================
  Coverage   86.28%   86.28%           
=======================================
  Files          21       21           
  Lines        1560     1560           
=======================================
  Hits         1346     1346           
  Misses        214      214

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