Add JaCoCo plugin for coverage reporting. Add additional tests for null/edge cases in TelnetSession, TelnetServer, and WebgitApplication.main to maximize coverage. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Add configuration properties class with worktreePath and gitDirPath settings, and JGit dependency. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>