Add searchable table filters

[cerredz]

Summary

• add an opt-in filter-search input to table column filter panels
• support default text matching plus a custom filter-search-method
• document the new props and expose them through TypeScript declarations and web-types metadata

Verification

• npx eslint packages/table/src/filter-panel.vue packages/table/src/table-column.js test/unit/specs/table.spec.js web-types.json --quiet
• node -e "JSON.parse(require('fs').readFileSync('web-types.json','utf8'))"
• git diff --check

Note: npm run build:theme cannot run on this host because node-sass@4.11.0 does not support Node.js v22.12.0 on Windows.

Fixes #3308