fix(developer): handle line breaks in debugger correctly

[mcdurdin]

The debugger memo takes input with \n but internally represents this as \r\n, so we need to strip out \r in order to track caret position correctly.

Fixes: #13292

User Testing

• TEST_LINE_BREAK: start a debugger session for a keyboard. Type text, and include multiple lines of content (press Enter to add a new line). Move through the text and verify that the cursor position tracks correctly. Use backspace to delete text and ensure that deletion works across line breaks. Finally, select text, including line breaks, and ensure that deleting it works correctly.

[keymanapp-test-bot]

User Test Results

Test specification and instructions

• ✅ TEST_LINE_BREAK (PASSED) (notes)

Test Artifacts

• Developer
  • Keyman Developer
  • Compiler Regression Tests
  • kmcomp.zip
• Keyboards
  • Test Keyboards

[mcdurdin]

Additional safety check

[darcywong00]

CI failed with

debug\Keyman.System.Debug.DebugUtils.pas(26): error E2018: Record, object or class type required 
debug\Keyman.System.Debug.DebugUtils.pas(31): error E2018: Record, object or class type required 
child\UfrmDebug.pas(37): error F2063: Could not compile used unit 'Keyman.System.Debug.DebugUtils.pas' 

Is this?

Suggested change

	SetLength(Result, t.Length+1);
	SetLength(Result, Length(t) + 1);

[mcdurdin]

I've fixed this by using System.SysUtils (missed from the selective commit)

[darcywong00]

lgtm

[dinakaranr]

Test Results

I tested this issue with the attached KeymanDeveloper"18.0.198-beta-test-13334" build(24/02/2025) on Windows 10. Here I am sharing my observation.

• TEST_LINE_BREAK (Passed):

1. Install Keyman attached the KeymanDeveloper"18.0.198-beta-test-13334" PR build on 24/02/2025.
2. Open the "gff_amheric" and "Hindi modular" keyboard projects loaded in the Keyman developer.
3. Click the "*.knm" link and then a new tab opens.
4. Click on the "Build" tab.
5. Compile the keyboard by clicking the "Compile Keyboard" button.
6. Verified that the compile success message appeared.
7. Open the debugger mode by clicking the "Start Debugging" button.
8. A Debugger window appeared.
9. Enter multiple lines in the debugger's box.
10. Press the "Enter" key to add a new line.
11. Move the cursor position between multiple lines using the "left and right" arrow.
12. Verified that the cursor position works correctly.
13. Press the "Backspace" key to delete text.
14. Verified that the text deletes work after pressing the delete key across multiple lines.
15. Select multiple lines.
16. Press the "delete" keys
17. Verified that the text was deleted across multiple lines.
    It works well. Thank you.