import rules, groupings, and order enforced by lint

[drewvolz]

Closes #7093

• Adds eslint-plugin-import
• Adds eslint-plugin-simple-import-sort
  • Example custom grouping inspired from here

Import rules to take into account:

• Imports come first
• No duplicates

Import groupings to ensure:

1. Node built-ins
2. Packages. react related packages come first.
3. react-native-* community packages
4. React navigation
5. Internal packages and scopes
6. Side effect imports.
7. Parent imports. Put .. last.
8. Other relative imports. Put same-folder imports and . last.
9. Style imports.
10. Image imports

Room for improvement here, plenty of room for feedback.

[codecov[bot]]

Codecov Report

Merging #7094 (9c42fc1) into master (d32030b) will not change coverage. The diff coverage is 0.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #7094 +/- ## ====================================== Coverage 8.47% 8.47% ====================================== Files 306 306 Lines 5225 5225 Branches 1404 1404 ====================================== Hits 443 443 Misses 4755 4755 Partials 27 27 ```

[hawkrives]

@drewvolz This is what we have for the import plugin:

'import/extensions': ['error', { js: 'never', jsx: 'never', json: 'always', ts: 'never', tsx: 'never' }],
        'import/named': 'error',
        'import/no-cycle': 'off',
        'import/no-namespace': 'warn',
        'import/no-restricted-paths': ['warn', { zones: [{ target: './test', from: './app/actions' }] }],
        'import/no-self-import': 'error',
        'import/order': [
            'warn',
            {
                groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
                'newlines-between': 'never',
                alphabetize: { order: 'asc', caseInsensitive: true },
            },
        ],
        'import/prefer-default-export': 'off',

and

{
            files: ['test/**'],
            env: { node: true },
            extends: ['plugin:@typescript-eslint/recommended-type-checked', 'plugin:@typescript-eslint/stylistic'],
            rules: {
                'import/no-extraneous-dependencies': ['error', { devDependencies: true }],