Add support for kicad_sym files to generate schematic views

[Exceluyi]

/claim #114
/closes #114

This PR introduces support for .kicad_sym files to enhance the schematic view in the KiCad component converter.

Features

• Parses .kicad_sym files to extract pin information, including pin numbers, names, and positions.
• Generates schPortArrangement and pinLabels for the schematic_component in the tscircuit soup.
• Integrates the .kicad_sym parsing into the existing file processing workflow in the web application.

Changes

• Added a new Zod schema for .kicad_sym files in src/kicad-zod.ts.
• Created src/parse-kicad-sym-to-kicad-json.ts to parse .kicad_sym S-expressions into a JSON representation.
• Created src/convert-kicad-sym-to-tscircuit-schematic.ts to convert the KicadSymJson into tscircuit schematic information.
• Updated src/convert-kicad-json-to-tscircuit-soup.ts to optionally accept KicadSymJson and populate the schematic_component.
• Updated the web application in src/site/App.tsx to handle .kicad_sym files and pass them to the conversion process.
• Added a new test file tests/schematic-from-sym.test.ts to verify the new functionality.

[vercel]

@Exceluyi is attempting to deploy a commit to the tscircuit Team on Vercel.

A member of the Team first needs to authorize it.

[techmannih]

Need visual snapshots?

[Exceluyi]

Need visual snapshots?

@techmannih done

[MustafaMulla29]

The snapshot doesn't look like a resistor