[Navigation.py] Cosmetic clean up

[jbleyel]

• Sort imports.
• Use f-strings.
• Use fileWriteLine().
• Correct debug text.
• Improve logging text.
• Improve comments.

[sonarcloud[bot]]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud