Collect open KLC MRs into one MR
I took the following changes and made them into one MR with only one history entry.
=== 3.0.38 - 2024-01-04
- Update F6.3 to specify pad properties for heatsink and BGA pads
- Update F6.3: require rounded rectangles for SMD pads
- Improve S4.2 Pin location rule: allow in-out-style voltage regulators
- Add dash and underscore escape convention in filters (S5.2)
- Improve hints for paste-only pads (F6.3)
- Add new rule to disallow de-morgan style (S3.9)