Add source diagnostic checks

[0hmX]

Summary

• add the check source subcommand using categorizeErrorOrWarning
• make plain check print every detected error and warning without category filtering
• preserve source and unknown diagnostics when existing category ignore flags are used
• keep existing category-specific commands and mappings unchanged

Behavior

source_property_ignored_warning remains visible through both plain check and check source. Plain check is exhaustive and includes source, netlist, placement, routing, pin-specification, and unknown diagnostic types.

No property-name matching, message parsing, Circuit JSON metadata, schema changes, or diagnostic-producer changes are involved.

Dependency

Uses the published @tscircuit/circuit-json-util@0.0.105 release containing the first-class source category.

Validation

• 12 focused and existing category tests passed against the published utility package
• TypeScript type-check passed
• production build passed
• formatting and diff checks passed

Supersedes #4042 with a clean branch based directly on current main.