feat: Support bigger font size in dashboard (#10974)

# Pull Request Template

## Description

Fixes
https://linear.app/chatwoot/issue/CW-4091/accessibility-improvement-support-bigger-font-size-for-the-dashboard

## Type of change

- [x] New feature (non-breaking change which adds functionality)

## How Has This Been Tested?

### **Loom video**

https://www.loom.com/share/1ab781859fa748a5ad54aacbacd127b4?sid=a7dd9164-a6de-462f-bff7-1b25e9c55b4f

## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/dashboard/assets/scss/widgets/_base.scss

@@ -82,7 +82,7 @@ input[type='url']:not(.reset-base) {
 }
 
 input[type='file'] {
-  @apply bg-white dark:bg-slate-800 leading-[1.15] mb-4;
+  @apply bg-white dark:bg-n-solid-1 leading-[1.15] mb-4;
 }
 
 // Select
@@ -141,11 +141,16 @@ code {
   @apply text-xs border-0;
 
   &.hljs {
-    @apply bg-slate-50 dark:bg-slate-700 text-slate-800 dark:text-slate-50 rounded-lg p-5;
+    @apply bg-n-slate-3 dark:bg-n-solid-3 text-slate-800 dark:text-slate-50 rounded-lg p-5;
 
     .hljs-number,
     .hljs-string {
       @apply text-red-800 dark:text-red-400;
     }
+
+    .hljs-name,
+    .hljs-tag {
+      @apply text-n-slate-11;
+    }
   }
 }