[ana3;in3] add check for aimec new coordinate system

[awirb]

In the aimec analysis a new coordinate system is defined along the thalweg (avaDir/Inputs/LINES/path_aimec.shp). If the provided line has to much curvature, this can introduce overlapping parts (with respect to the original data in cartesian coordinates) in the new coordinate system.

In this PR, introduce two checks:

1. if domain boundaries (left and right of the thalweg) are selfintersecting lines -> Error
2. if any of the new coordinate lines (parallel to the thalweg that form new coordinate system) in x, y coordinates intersect -> Error

The second check would also cover errors of the first check, however it saves computational time if the first check already fails.

[qltysh]

All good ✅

[qltysh]

Coverage Impact

⬆️ Merging this pull request will increase total coverage on master by 0.06%.

Modified Files with Diff Coverage (2)

Rating	File	% Diff	Uncovered Line #s
	avaframe/ana3AIMEC/aimecTools.py	100.0%
	avaframe/in3Utils/geoTrans.py	78.6%	2125-2127
	Total	91.2%

🤖 Increase coverage with AI coding...

In the `checkAimecDomain` branch, add test coverage for this new code:

- `avaframe/in3Utils/geoTrans.py` -- Line 2125-2127

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