Added documentation for the plugins.query.field_type_tolerance setting (#1300)

[normanj-bitquill]

Description

Add documentation for the plugins.query.field_type_tolerance setting.

Related Issues

Resolves #1300

Check List

• [ ] New functionality includes testing.
• [ ] New functionality has been documented.
• [ ] New functionality has javadoc added.
• [ ] New functionality has a user manual doc added.
• [ ] API changes companion pull request created.
• [ ] Commits are signed per the DCO using --signoff.
• [ ] Public documentation issue/PR created.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[normanj-bitquill]

could u add limitation of this setting. for instance, expression will failed.

@penghuo I added a limitations section.