Fix : decoupling capacitor partition to include main chip

[Prashant27-07]

This PR fixes the decoupling capacitor partition logic in ChipPartitionsSolver.

Previously, partitions created for decoupling capacitor groups excluded the main chip.
This caused the partition to miss the chip that the capacitors were actually associated with.

This change ensures that the main chip is included in the partition together with the decoupling capacitors.

Closes #15

[vercel]

@Prashant27-07 is attempting to deploy a commit to the tscircuit Team on Vercel.

A member of the Team first needs to authorize it.

[Prashant27-07]

I ran the formatter and pushed the formatting commit.

The CI failure seems to come from a dependency issue:

convertCircuitJsonToSchematicSimulationSvg is not exported from circuit-to-svg.

The error appears unrelated to the changes in ChipPartitionsSolver.

Please let me know if you'd like me to investigate further or adjust the solver logic.