Added Würth WA-SMSI M2.5 parts, generated by script
Source: kicad-footprint-generator!799
Series page: https://www.we-online.com/catalog/en/SMSI_SMT_STEEL_SPACER_M2_5_THREAD_INTERNAL
Datasheet:
H=0.5mm (H1=0.9): https://www.we-online.com/catalog/datasheet/9774005151.pdf
H=1mm (H1=1.4): https://www.we-online.com/catalog/datasheet/9774010151.pdf