fix: allow boolean column sort configuration

[sridharkalaibala]

Summary

Allows TColumn.sort to be boolean | SortConfig, matching the documented configuration and existing header normalization. A typed column with sort: true or sort: false currently fails with TS2559 even though those settings work at runtime.

The table header now narrows object-valued sort configuration before accessing compare or passing plugin props. Adds typed header coverage and a rendered-table test for enabled/disabled columns and custom comparator forwarding on clicks.

Fixes #1510.

Validation

• New typed regression fails on upstream with TS2559 for both boolean values; passes after the change.
• Full Jest suite: 194 tests and 36 snapshots passed across 34 suites.
• Full ESLint: zero errors, 36 warnings; changed-file check has only the existing Plugin<any> warning. Changed files pass Prettier and git diff --check.
• Release type check reports six dependency declaration errors, verified identical on upstream and patched source. Declaration generation with --skipLibCheck succeeds and emits sort?: boolean | SortConfig.
• Browser E2E and complete bundle/plugin build were not run. No dependency or lockfile changes.