feat: add ModelCharacteristics view and fix BFCL converter data quality

fix (expression-builder): reject empty expressions and fix null vs undefined invalid state

feat: agentic task type, BFCL multi-turn converter, status badges, and ranking fix

feat: schema v2, tool_calling evaluation, BFCL converter, UI polish, and expression fixes (#18)

chore (maintainance): Update depdencies, copyright and minimal support for chat template.

fix (aggregator): Fix sort in median aggregator.

fix (metrics): Fix median aggregator due to incorrect sort.

fix (aggregators): Minor fix to median aggregator.

feat (aggregator): Added support for median aggregator.

feat (expression): Experimental support for expression based filtering in model behavior. (#13)

fix (export): Minor fix to export with additional notebook to merge.

chore: Initial commit.