fix(amazonq): visual bugs in prompt input field aws#5308

## Problem
There are 2 minor visual bugs in Amazon Q Chat UI:
* When the prompt input text exceeds the width of the chat box it's not always wrapped correctly.
* When user types empty spaces at the beginning of lines inside prompt, it appears like a code block instead of a paragraph.

## Solution
* Prompt input is properly sized and matches with the textarea underneath.
* Removed empty spaces for each line.

[MynahUI 4.15.2](https://github.com/aws/mynah-ui/releases/tag/v4.15.2)

Author: viktorsaws

package-lock.json

@@ -0,0 +1,4 @@
+{
+	"type": "Bug Fix",
+	"description": "Amazon Q Chat: Fixes a bug when the prompt input exceeds the width of the chat box it's not always wrapped correctly."
+}

packages/amazonq/.changes/next-release/Bug Fix-3025412d-2c04-4d84-9714-d2b067a2ba95.json

@@ -0,0 +1,4 @@
+{
+	"type": "Bug Fix",
+	"description": "Amazon Q Chat: Fixes a bug when user input contains 4 or more spaces at the beginning of the line for multiline inputs, that line appears like a code block instead of a paragraph"
+}

packages/amazonq/.changes/next-release/Bug Fix-fbd79ad7-715d-40e6-b1ee-7388b5689995.json

@@ -4115,7 +4115,7 @@
         "@aws-sdk/property-provider": "3.46.0",
         "@aws-sdk/smithy-client": "^3.46.0",
         "@aws-sdk/util-arn-parser": "^3.46.0",
-        "@aws/mynah-ui": "^4.15.1",
+        "@aws/mynah-ui": "^4.15.2",
         "@gerhobbelt/gitignore-parser": "^0.2.0-9",
         "@iarna/toml": "^2.2.5",
         "@smithy/middleware-retry": "^2.3.1",