* feat(options): add setting to enable git integration for custom worktrees
* fix(autocmds): add additional check for AstroGitFile to see if file is in custom worktree
* refactor(autocmds): extract `in_worktree()` to custom utility function `find_worktree()`
* feat(mappings): allow toggle lazygit to automatically load git worktrees if available
* chore(mappings): cleanup redundant toggle lazygit mapping