feat: Adding dark mode, cleaning the UI a small bit, adding a link to the API documentation, and linting the code. (#2182)

# What does this PR do?

This PR adds a few enhancements:
- Dark mode 
- A dark mode icon
- Adds a link to the API documentation
- Adds prettier and a linter to the code 
- Aligning the default text
- Linted the code 

## Before:
![Screenshot 2025-05-15 at 3 57
15 PM](https://github.com/user-attachments/assets/996db083-4a4f-4683-a2b4-e7c09de96135)

## After (dark mode):
![Screenshot 2025-05-15 at 3 57
50 PM](https://github.com/user-attachments/assets/9d45d26b-2449-4a5f-813e-29e07e94b793)

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
[Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.*]

[//]: # (## Documentation)


Related to https://github.com/meta-llama/llama-stack/issues/2085

---------

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

llama_stack/ui/components/ui/input.tsx

@@ -1,6 +1,6 @@
-import * as React from "react"
+import * as React from "react";
 
-import { cn } from "@/lib/utils"
+import { cn } from "@/lib/utils";
 
 function Input({ className, type, ...props }: React.ComponentProps<"input">) {
   return (
@@ -11,11 +11,11 @@ function Input({ className, type, ...props }: React.ComponentProps<"input">) {
         "file:text-foreground placeholder:text-muted-foreground selection:bg-primary selection:text-primary-foreground dark:bg-input/30 border-input flex h-9 w-full min-w-0 rounded-md border bg-transparent px-3 py-1 text-base shadow-xs transition-[color,box-shadow] outline-none file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
         "focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px]",
         "aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
-        className
+        className,
       )}
       {...props}
     />
-  )
+  );
 }
 
-export { Input }
+export { Input };