feat: added action to the list mcp servers result header for buttons (#651)

## Problem

ListMcpServersResult needed actions for header buttons for mcp admin
control.

## Solution
- Added actions for ListMcpServersResult

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## License

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Author: ashishrp-aws

types/chat.ts

@@ -546,6 +546,7 @@ export interface Action {
     id: string
     icon?: IconType
     text: string
+    description?: string
 }
 export interface ConversationItem {
     id: string
@@ -647,6 +648,7 @@ export interface ListMcpServersResult {
             title?: string
             status?: Status
         }
+        actions?: Action[]
     }
     list: DetailedListGroup[]
     filterOptions?: FilterOption[]