feat: Add components to show steps in the copilot thinking process (#11530)

This PR adds the components for new Copilot UI
- Added a Header component
- Added a thinking block.
- Update the outline on copilot input

---------

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/dashboard/i18n/locale/en/integrations.json

@@ -327,12 +327,14 @@
     "NAME": "Captain",
     "HEADER_KNOW_MORE": "Know more",
     "COPILOT": {
+      "TITLE": "Copilot",
       "SEND_MESSAGE": "Send message...",
       "EMPTY_MESSAGE": "There was an error generating the response. Please try again.",
       "LOADER": "Captain is thinking",
       "YOU": "You",
       "USE": "Use this",
       "RESET": "Reset",
+      "SHOW_STEPS": "Show steps",
       "SELECT_ASSISTANT": "Select Assistant",
       "PROMPTS": {
         "SUMMARIZE": {