Add checker ruleset for XOMP-files, update handling of units

[DavidJRitter904]

Describe your changes

Added checker ruleset for XOMP-files and updated the property units for conformity to documentation.

Issue ticket number and link

Fixes #354 .

Checklist before requesting a review

• I have performed a self-review of my code/documentation.
• My changes generate no new warnings during the documentation generation.

[DavidJRitter904]

I have added valid ranges for the following XOMP-properties:

Property	Range	Comment
1. surface height RMS	0 --> inf (m)	upper limit left open as we have not defined any restrictions
2. surface correlation length	0 --> inf (m)	no upper limit as no restriction defined
3. emissivity coefficient	0 --> 1	referenced to black body
4. temperature	0 --> inf (K)
5. youngs modulus	0 --> 1,5 x 1012 Pa	upper limit defined a bit higher than diamond (1,22 x 1012 Pa)
6. poissons ratio	-1 --> 0.5	from extreme auxetic to perfectly inkompressible
7. density	0 --> 25 kg m-3	upper limit defined a bit higher than Osmium (natural material: 22,59 kg m-3 - diamond: 3,52 kg m-3)
8. coefficient of retroreflectivity	0 --> 5000 cd lx-1 m-2	current road signs 2000 - 3000 cd lx-1 m-2

I think this is a good starting point for these value ranges.
Since we have not clearly defined restrictions to the surface roughness parameters such as differentiation of micro and macro ranges, I left the range open to be defined by the user.

@ClemensLinnhoff maybe you can add Sandro as well. Is not possible for me to assign.

[ClemensLinnhoff]

@SandroReith could you also review this?

[ClemensLinnhoff]

I added some of the reasoning you gave here in the PR to the rules. Then people who read the documentation also know, why these boundaries were chosen.