IoT devices mega-panel, more mixin examples

[ducky64]

Applications of mixins and 3 PCBs: an IoT knob, IoT CPU fan controller / driver, and IoT power LED driver (buck converter).

Bugfixes

• Remove USB from ESP32C3 - it was debug only, not programmable (like ESP32S3)

Library changes

• Refactor RotaryEncoderWithSwitch to use a RotaryEncoderSwitch mixin
• Add parallel wrapper hierarchy for RotaryEncoder, which delegates mixins appropriately
• Add Sunlord and TDK inductors - because we didn't really have power inductors before
  • In some older designs, peg their inductors to the prior selection
• Power and CurrentSense resistors: propagate actual_resistance
• OpenDrainDriver, which can be used for voltage translation with an external pullup
• Add voltage and current ratings for PJ-102AH PTH barrel jack
• PJ-036AH SMD barrel jack
• VL53L0X: optional xshut, tied high by default
• SHTC3 temperature/humidity sensor
• CPU fan connector, both 3-pin and 4-pin variants, with abstract base type and PWM control mixin
• AL8861 buck LED driver - in the future there might be a LedDriver with PwmControl mixin
• ESP32C3: hard-tie strap pins to rails to eliminate resistors
  • Changes netlists on prior designs
• JST PhK: add horiztonal version, add JLC parts
• EC05E hollow-shaft rotary encoder with footprint
• Refactor speaker drivers into their own file, add PAM8302A speaker driver (which is what we've been using)
• Update netlists for above changes

Designs

• SVG-PCB LED ring generators for all the IoT boards, they're mostly variations of each other

Core logic changes

• Don't overwrite the default refinement for mixin types
• When using mixins, take the last default refinement (instead of relying on only the default refinement in the base class)
• Refactor Parameter compiler task to not keep HasParams which doesn't support equality and usage in a set. (implementation detail only)