Add linter file

[riteshe63]

35

Currently the atom consists of by default rules defined for eslint, htmlhint and stylelint for the developers. Although in our case, the atom should consist of the rules defined by us. The files in which we need to define our rules are: 1 .eslintrc 2 .htmlhint 3 .stylelintrc 4 tsconfig.json

[gaurav21r]

@riteshe63 Not adding an .htmlhint until #13 is closed