Add pin capability enums to PinAttributeMap and remove protocol booleans

[seveibar]

Motivation

• Consolidate protocol-specific boolean flags into a flexible capability model so pins can declare multiple supported protocols and a current/active protocol.
• Replace scattered fields like isI2cSda / isSpiMiso / isSpiSck with a single typed set of capability values to simplify typing and runtime validation.
• Provide explicit runtime schema for capabilities to prevent invalid protocol names and enable typed tooling and docs to reflect the change.

Description

• Replaced protocol boolean fields in PinAttributeMap with three new fields: capabilities?: Array<...>, activeCapabilities?: Array<...>, and activeCapability?: ... in lib/common/layout.ts using the enum values "i2c_sda", "i2c_scl", "spi_cs", "spi_sck", "spi_mosi", "spi_miso", "uart_tx", "uart_rx".
• Updated the Zod runtime schema pinAttributeMap to validate the new capabilities, activeCapabilities, and activeCapability fields with constrained z.enum values.
• Updated tests to use the new fields (modified tests/pinAttributes2.test.ts and tests/chip3-type-tests.test.tsx) so runtime parsing and type-level checks exercise the new model.
• Regenerated generated documentation artifacts (generated/COMPONENT_TYPES.md, generated/PROPS_OVERVIEW.md) so docs reflect the new PinAttributeMap shape and ran formatting to keep repository consistent.

Testing

• Ran generation scripts: bun scripts/generate-component-types.ts, bun scripts/generate-manual-edits-docs.ts, bun scripts/generate-readme-docs.ts, and bun scripts/generate-props-overview.ts and updated generated outputs.
• Ran unit/typetests: bun test tests/pinAttributes2.test.ts tests/chip3-type-tests.test.tsx and observed all tests passing (6 pass, 0 fail).
• Performed TypeScript typecheck with bunx tsc --noEmit which completed without errors.
• Ran formatter via bun run format and re-ran bun test to confirm tests still pass after formatting.

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Codex Task