Add friendlier YAML syntax error messages

[coderabbitai]

Problem

The current YAML parsing error messages are unhelpful and don't provide sufficient information for users to diagnose and fix YAML syntax issues.

Current Behaviour

When a YAML syntax error occurs, users see generic output like:

Run ./target/debug/netsuke --verbose build generated.txt
YAML parse error
Error: Process completed with exit code 1.

Expected Behaviour

Error messages should be more descriptive and include:

• Specific line and column numbers where the error occurred
• Description of what type of syntax error was encountered
• Suggestions for how to fix common YAML syntax issues

Context

This issue was identified during testing of PR #45.

References:

• PR: Add verbose logging via tracing #45
• Comment: Add verbose logging via tracing #45 (comment)
• Issue: Add friendlier YAML syntax error messages #49