cli: implement check placement command using placement analysis package

[seveibar]

Motivation

• Add a CLI command to partially build and validate component placements with optional scoping by refdes.
• Wire in a dedicated placement analysis package to produce human-readable placement diagnostics.

Description

• Implemented the placement check flow in cli/check/placement/register.ts including checkPlacement, input resolution, prebuilt .circuit.json handling, and integration with analyzeAllPlacements and analyzeComponentPlacement from @tscircuit/circuit-json-placement-analysis.
• Updated the check placement CLI registration to accept [file] and optional [refdes] arguments and to print errors with a non-zero exit code on failure.
• Added tests/cli/check/check-placement.test.ts which creates a temporary TSX board file and verifies both scoped (refdes) and global placement analysis paths.
• Updated package.json and bun.lock to add the new dependency and to pin/bump related packages in the lockfile.

Testing

• Ran the new unit tests with bun test tests/cli/check/check-placement.test.ts and both tests passed.
• Executed the new checkPlacement code path locally by invoking the CLI action and verified it returns the analysis string for scoped and unscoped runs.

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Codex Task