Add version info to startup banner (#14625)

# Description

Adds version info to the Startup Banner

# User-Facing Changes

## Before


![image](https://github.com/user-attachments/assets/de2a415f-1608-4d87-ab28-f3238cf532c3)

## After


![image](https://github.com/user-attachments/assets/db3f8419-0680-4a0b-9f09-8d9a273c4726)

# Tests + Formatting

- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
- 
# After Submitting

N/A

crates/nu-std/tests/test_core.nu

@@ -3,5 +3,5 @@ use std/assert
 #[test]
 def banner [] {
     use std/core
-    assert ((core banner | lines | length) == 15)
+    assert ((core banner | lines | length) == 16)
 }