Add the six registry parts the Class A I2C sensor node needs #321

Is your feature request related to a problem? Please describe.

#261 requires no registry change, but its agent-made board needs six parts main lacks.

Describe the feature you are requesting, as well as the possible use case(s) for it.

Add stm32g030f6p6, bme680_lga8, 24lc256_soic8, ch340c, header_1x12 and header_1x5 to the registry.

Indicate the importance of this feature to you.

Blocks #268; lets that pull request carry only the board.

Anything else?

The agent authored these through author_part; each carries footprint_dimensions. Parent #39.