Ensure rule docs mention all rule options

[bmish]

Add test to ensure:

1. Any rule with options has a ## Options section in its rule doc.
2. Any named rule options (for example, the pattern option for the require-meta-docs-description rule) are mentioned in the rule doc.

Based on the same test I wrote here: https://github.com/ember-cli/eslint-plugin-ember/blob/4f26c0bc7e34400007e02939a9c6e183078a3e87/tests/rule-setup.js#L111

Eventually, I'd like to add a lint rule to enforce these "rule setup" tests for any eslint plugin.

[aladdin-add]

Eventually, I'd like to add a lint rule to enforce these "rule setup" tests for any eslint plugin.

eslint does not support ext in config files, so users have to use eslint --ext=.js,.md?

[bmish]

Eventually, I'd like to add a lint rule to enforce these "rule setup" tests for any eslint plugin.

eslint does not support ext in config files, so users have to use eslint --ext=.js,.md?

More likely, the rule would be similar to #2, where a violation is reported in the rule JS file if the documentation file that we manually read in is missing or has missing sections.