feat: add ModelCharacteristics view and fix BFCL converter data quality

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

fix: lint and build errors ahead of merge to main

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)

feat (chat task): Minor enhancements to chat task view.

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

fix (CSS): Minor CSS fix for performance overview tab.

feat (Filters): Allow user to select all values in a filter.

fix (model behavior): Fix crash in model behavior due to unrefreshed state.

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

feat (comments): Allow user to delete and edit comment.

feat (Performance Overview): Allow user to hide metrics from tables.

chore: Fix typos

chore: Initial commit.