add fields, pick components, and add footprints

Merge remote-tracking branch 'origin/iris-symbols' into fill-fields

update gitignore

Update IRIS/Muons V4 footprint

Added major IRIS V4 symbols, footprints, models

Added major IRIS components and 3D symbols

Reverted dummy changes

Testing git permissions

Added more 3D models for IRIS footprints

Merge branch 'iris-symbols' of https://github.com/calstar/hardware-sch-blocks into iris-symbols