fix: send cursorState as array to match LSP server ChatParams interface

The LSP server expects cursorState to be CursorState[] (array), but JetBrains
was sending it as a single object. This caused the server to fall back to
default cursor state when accessing cursorState?.[0] on a non-array value.

Fixes selection detection when user types directly in chat panel.

Author: aseemxs

plugins/amazonq/chat/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/webview/BrowserConnector.kt

@@ -241,7 +241,7 @@ class BrowserConnector(
 
                 val enrichmentParams = mapOf(
                     "textDocument" to textDocumentIdentifier,
-                    "cursorState" to cursorState,
+                    "cursorState" to cursorState?.let { listOf(it) },
                 )
 
                 val serializedEnrichmentParams = serializer.objectMapper.valueToTree<ObjectNode>(enrichmentParams)