Fix newline handling in thermal printer text wrapping

[ariel-nathan]

📝 Description
This PR addresses a critical bug in the printWrappedUpsideDown function where newline characters (\n) in user input were not being handled properly, causing malformed output on the thermal printer.

🐞 Bug Fix
Problem: When users entered text with newlines (e.g., pressing Shift + Enter in the web form), the thermal printer would produce garbled output with incorrect line ordering and spacing.

Before:

Input: "Todo:\n[ ] Task 1\n[ ] Task 2\n[ ] Task 3\n[ ] Task 4"

Printed:
[ ]
[ ] Task 2
[ ] Task 1
Todo:
[ ] Task 4
Task 3

After:

Input: "Todo:\n[ ] Task 1\n[ ] Task 2\n[ ] Task 3\n[ ] Task 4"

Printed:
Todo:
[ ] Task 1
[ ] Task 2
[ ] Task 3
[ ] Task 4

Code formatting improvements:

• Applied VSCode C/C++ extension formatting for better readability

📋 Technical Details
The updated function now:

• Splits input text by newline characters first
• Applies word wrapping to each line segment individually
• Maintains the existing 32-character line limit (maxCharsPerLine)
• Preserves the reverse printing order for proper 180° rotation display