docs(exception-filters): docs for error options

[thiagomini]

add docs explaining how to use the new options object containing both the cause and description.

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• The commit message follows our guidelines: https://github.com/nestjs/docs.nestjs.com/blob/master/CONTRIBUTING.md

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What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Docs
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Issue Number: NestJS #10392

Does this PR introduce a breaking change?

• Yes
• No

Other information

[kamilmysliwiec]

LGTM