[Refactor] Improve coding convention

[0xkynz]

Is your feature request related to a problem? Please describe.

• [ ] Should constant key, and don't use string for key

Problem:

          transferFee: getConfigKey('CSPR_TRANSFER_FEE'),

Should:

          transferFee: getConfigKey(CONFIGS.CSPR_TRANSFER_FEE),

• [ ] Add editorConfig to project
• [ ] Order sort import

import React from 'react'; // React should come first
import PropTypes from 'prop-types'; // React-related imports

import SomeThirdPartyLibrary from 'some-library'; // Third-party library imports
import AnotherThirdPartyLibrary from 'another-library';

import SomeAppSpecificComponent from './SomeAppSpecificComponent'; // Application-specific imports
import AnotherAppSpecificComponent from './AnotherAppSpecificComponent';

• [ ] Move client/** folder to root directory
• [ ] Create modules for UI Components, should move client/src/components/web-extension -> client/src/modules
• [ ] Eslint is not working