feat: Allow customizing the responses, flows in Captain (#11385)

- Ability to provide custom instructions to captain

<img width="1107" alt="Screenshot 2025-04-28 at 6 11 43 PM"
src="https://github.com/user-attachments/assets/f94cbccc-b4d8-48fd-b6b9-55524129bc50"
/>

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

@@ -333,6 +333,14 @@
       "RESET": "Reset",
       "SELECT_ASSISTANT": "Select Assistant"
     },
+    "PLAYGROUND": {
+      "USER": "You",
+      "ASSISTANT": "Assistant",
+      "MESSAGE_PLACEHOLDER": "Type your message...",
+      "HEADER": "Playground",
+      "DESCRIPTION": "Use this playground to send messages to your assistant and check if it responds accurately, quickly, and in the tone you expect.",
+      "CREDIT_NOTE": "Messages sent here will count toward your Captain credits."
+    },
     "PAYWALL": {
       "TITLE": "Upgrade to use Captain AI",
       "AVAILABLE_ON": "Captain is not available on the free plan.",
@@ -371,20 +379,41 @@
         "ERROR_MESSAGE": "There was an error creating the assistant, please try again."
       },
       "FORM": {
+        "UPDATE": "Update",
+        "SECTIONS": {
+          "BASIC_INFO": "Basic Information",
+          "SYSTEM_MESSAGES": "System Messages",
+          "INSTRUCTIONS": "Instructions",
+          "FEATURES": "Features",
+          "TOOLS": "Tools "
+        },
         "NAME": {
-          "LABEL": "Assistant Name",
-          "PLACEHOLDER": "Enter a name for the assistant",
-          "ERROR": "Please provide a name for the assistant"
+          "LABEL": "Name",
+          "PLACEHOLDER": "Enter assistant name"
         },
         "DESCRIPTION": {
-          "LABEL": "Assistant Description",
-          "PLACEHOLDER": "Describe how and where this assistant will be used",
-          "ERROR": "A description is required"
+          "LABEL": "Description",
+          "PLACEHOLDER": "Enter assistant description"
         },
         "PRODUCT_NAME": {
           "LABEL": "Product Name",
-          "PLACEHOLDER": "Enter the name of the product this assistant is designed for",
-          "ERROR": "The product name is required"
+          "PLACEHOLDER": "Enter product name"
+        },
+        "WELCOME_MESSAGE": {
+          "LABEL": "Welcome Message",
+          "PLACEHOLDER": "Enter welcome message"
+        },
+        "HANDOFF_MESSAGE": {
+          "LABEL": "Handoff Message",
+          "PLACEHOLDER": "Enter handoff message"
+        },
+        "RESOLUTION_MESSAGE": {
+          "LABEL": "Resolution Message",
+          "PLACEHOLDER": "Enter resolution message"
+        },
+        "INSTRUCTIONS": {
+          "LABEL": "Instructions",
+          "PLACEHOLDER": "Enter instructions for the assistant"
         },
         "FEATURES": {
           "TITLE": "Features",
@@ -395,7 +424,8 @@
       "EDIT": {
         "TITLE": "Update the assistant",
         "SUCCESS_MESSAGE": "The assistant has been successfully updated",
-        "ERROR_MESSAGE": "There was an error updating the assistant, please try again."
+        "ERROR_MESSAGE": "There was an error updating the assistant, please try again.",
+        "NOT_FOUND": "Could not find the assistant. Please try again."
       },
       "OPTIONS": {
         "EDIT_ASSISTANT": "Edit Assistant",