Docs: Move preset list into table in README

[bmish]

Many other ESLint plugins use a table for listing presets/configs (similar to the rules table):

• https://github.com/ember-cli/eslint-plugin-ember#-configurations
• https://github.com/ember-template-lint/ember-template-lint#presets
• https://github.com/platinumazure/eslint-plugin-qunit#configurations

[bmish]

@aladdin-add I think your conflict resolution was wrong. I can fix it.

[aladdin-add]

ah, thanks! ❤️