Add documentation for error lookups workflow in omnibox

Author: jdorfman

docs/omnibox/query-types/error-lookups.mdx

@@ -1 +1,32 @@
 # Error Lookups
+
+<p className="subtitle">Error Lookups is a conversational workflow for the Sourcegraph omnibox that helps developers understand error messages by providing plain-English explanations of when and why specific errors occur in their codebase and external service calls.</p>
+
+Developers can use Error Lookups to understand error messages occurring in their codebase. When encountering an error, especially from external services or dependencies, developers can use the omnibox to:
+
+1. Search for specific error messages across their codebase
+2. Select relevant files where the error is thrown or handled
+3. Request a natural language explanation of the error's context, triggers, and implications
+
+The workflow combines Sourcegraph's code search capabilities with AI-powered analysis to provide developers with clear, contextual understanding of error scenarios. Instead of having to dig through documentation or source code manually, developers can quickly grasp:
+
+* The specific conditions that trigger the error
+* The underlying reasons for the error occurrence
+* Common scenarios where this error might appear
+* Potential approaches to handling or preventing the error
+
+This approach helps developers make more informed decisions about error handling and debugging, reducing the time spent deciphering cryptic error messages or searching through external documentation.
+
+## Try it
+
+* Query for `"unsupported value for type filter"`
+* Select the file(s) where the error is thrown
+* Follow up with "Explain when and why this error is thrown"
+
+## Demo
+
+🔴 Upload video to GCP 🔴
+
+<video width="100%" controls>
+  <source src="https://p21.p4.n0.cdn.zight.com/items/QwuyA4q7/dda31e22-d3ba-4844-b1d5-95978f2a7b1f.mp4?v=75789259e408c85fa268aa105c974894" type="video/mp4" />
+</video>