Add HTSSOP-28 (SOT1172-3) package definition for PCA9745BTW

Adding an HTSSOP28 package for PCA9745BTW, known to NXP as SOT1172-3. Used by PCA9745BTW, PCA9955ATW, PCA9955BTW, and PCU9955ATW.

Datasheet for package: https://www.nxp.com/docs/en/package-information/SOT1172-3.pdf

Datasheet for part using package: https://www.nxp.com/docs/en/data-sheet/PCA9745B.pdf

Merge request in kicad-footprints: kicad-footprints!3411 (merged)