Error Tracking documentation

• Documents Error Tracking
• New features from #55178 (closed), #55177 (closed). Epic here: &169 (closed)

New doc or update?

• New documentation
• Update existing documentation

Checklists

Product Manager

• Add the correct labels
• Add the correct milestone
• Indicate the correct document/directory for this feature
• Fill the doc blurb below

Documentation blurb

• Doc title

  Error Tracking

• Feature overview/description

  Adds Error Tracking to CE and EE, via integration with Sentry. Shows a list of errors from Sentry.

• Feature use cases

  TODO

Developer

• Copy the doc blurb above and paste it into the doc
• Write the tutorial - explain how to use the feature
• Submit the MR using the appropriate MR description template