* support agent skills * make the new agent skill provider experimental * Fix file encoding: add UTF-8 BOM to .cs files Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Fix final newline and simplify new expressions Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Fix broken links in Agent Skills sample README Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Add null check for skillPaths parameter Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Normalize references * normilize skill path * address comments regarding symlink check * address comments * fix failing test + regex improvements * small optimizations and improvments * address pr review comments * Update dotnet/src/Microsoft.Agents.AI/Skills/FileAgentSkillsProvider.cs Co-authored-by: Roger Barreto <19890735+rogerbarreto@users.noreply.github.com> * address pr review comments * address pr review comments --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Roger Barreto <19890735+rogerbarreto@users.noreply.github.com>