YOLO26 ReduceMax in graph + YOLO26 with NMS in graph option

[dtronmans]

Purpose

Was just a bit worried about clashes with the PR that adds Yolo26 NMS so I merged the two in this PR.

Yolo26 conversion with one2one head:

• tools yolo26n.pt --imgsz "640" --version yolov26_nms
• Since this is the first time the same .pt file can have two different export branches, I had to add cli_version flag to the tests

ReduceMax in graph:

• Not an option/flag it's just always there
• Need a corresponding PR in depthai-nodes that does not perform cls_scores = scores.max(axis=-1)

Specification

Dependencies & Potential Impact

Deployment Plan

Testing & Validation

Detect:

Pose:

Segment:

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
30374	6498	21%	0%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
tools/main.py	86%	🟢
tools/modules/heads.py	51%	🟢
tools/version_detection/version_detection.py	47%	🟢
tools/yolo/yolov8_exporter.py	64%	🟢
TOTAL	62%	🟢

updated for commit: a854110 by action🐍

[aljazkonec1]

Thanks for the quick implementation! Before merge I want to test out parser implementation on depthai to make sure no no other changes to the model are needed, if thats OK @klemen1999

[github-actions]

Test Results

  6 files    6 suites   23m 16s ⏱️
 26 tests  26 ✅ 0 💤 0 ❌
156 runs  156 ✅ 0 💤 0 ❌

Results for commit a854110.