Add dai.ImgTransformations to messages and improvements to Text detection parser

[aljazkonec1]

This PR adds the following:

1. dai.ImgTransformations attribute to all depthai-nodes messages. This is necessary as the information inside dai.ImgTransofrmations is needed in later nodes for dai.ImgManip, and for visualization purposes as width, height and other values are stored in this attribute.
2. adds some improvements to Text Detection parser and Palm detection parser where the angle is rounded to a full degree.
3. Make Text detection parser more robust and simplify some postprocessing functions, making the detections much more reliable

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 37.73585% with 66 lines in your changes missing coverage. Please review.

Project coverage is 33.38%. Comparing base (37a2d92) to head (23e6c55).
Report is 14 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
depthai_nodes/ml/parsers/utils/ppdet.py	0.00%	8 Missing ⚠️
depthai_nodes/ml/messages/classification.py	55.55%	4 Missing ⚠️
depthai_nodes/ml/messages/clusters.py	55.55%	4 Missing ⚠️
depthai_nodes/ml/messages/img_detections.py	55.55%	4 Missing ⚠️
depthai_nodes/ml/messages/keypoints.py	55.55%	4 Missing ⚠️
depthai_nodes/ml/messages/lines.py	55.55%	4 Missing ⚠️
depthai_nodes/ml/messages/map.py	55.55%	4 Missing ⚠️
depthai_nodes/ml/messages/prediction.py	55.55%	4 Missing ⚠️
depthai_nodes/ml/messages/segmentation.py	55.55%	4 Missing ⚠️
depthai_nodes/ml/parsers/lane_detection.py	0.00%	4 Missing ⚠️
... and 16 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #142      +/-   ##
==========================================
- Coverage   33.40%   33.38%   -0.02%     
==========================================
  Files          68       69       +1     
  Lines        3739     3828      +89     
==========================================
+ Hits         1249     1278      +29     
- Misses       2490     2550      +60     

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[klemen1999]

LGTM

[jkbmrz]

Added a small remark but LGTM otherwise!

[jkbmrz]

As the transformation property and setter are the same for every message, we could also make a message parent class that would define them once instead of copy-pasting them to all messages.

[aljazkonec1]

Yes I also thought about it. I asked depthai team and when this will get ported, all messages will inherit from dai.Buffer and will have similar structure as dai.ImgDetections currently has. Thats why I left it as is.