Add visualization methods to all message types

[aljazkonec1]

This PR adds default getVisualizationMessage methods to all messages. These methods allow depthai to automatically annotate outputs of all models that use these message types. This is the "default" visualizations, if a user wants custom or different annotations, he would have to override these functions or create a new AnnotationNode.

The annotations were tested using RVC4 and RVC2 (where aplicable) on the following models:
YuNet, YOLOv6, YOLOv8, text detection, M-LSD, Fast SAM, Selfie segmentation, PP-LiteSeg, FaceLandmarker, OCR, Emotion classification, Depthanything, Midas, ESRGAN, Ultra Fast Lane Detection

[aljazkonec1]

In Keypoints message there is a bug with Visualizer, where it does not show points, for the time being I changed to lines instead.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 15.68627% with 129 lines in your changes missing coverage. Please review.

Project coverage is 36.10%. Comparing base (f11ad94) to head (3f4ff72).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
depthai_nodes/ml/messages/img_detections.py	7.50%	37 Missing ⚠️
depthai_nodes/ml/messages/clusters.py	16.66%	20 Missing ⚠️
depthai_nodes/ml/messages/segmentation.py	12.50%	14 Missing ⚠️
depthai_nodes/ml/messages/classification.py	13.33%	13 Missing ⚠️
depthai_nodes/ml/messages/keypoints.py	13.33%	13 Missing ⚠️
depthai_nodes/ml/messages/prediction.py	13.33%	13 Missing ⚠️
depthai_nodes/ml/messages/lines.py	14.28%	12 Missing ⚠️
depthai_nodes/ml/messages/map.py	22.22%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #141      +/-   ##
==========================================
+ Coverage   35.93%   36.10%   +0.17%     
==========================================
  Files          69       70       +1     
  Lines        3835     3991     +156     
==========================================
+ Hits         1378     1441      +63     
- Misses       2457     2550      +93     

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[klemen1999]

Generally LGTM, added some clarifying questions.

[jkbmrz]

Generally LGTM. Adding a few comments.

[kkeroo]

LGTM, 2 small comments/questions