Add copilot completions

chezmoi/dot_zshrc.d/executable_copilot.zsh

@@ -0,0 +1,23 @@
+#!/usr/bin/zsh
+
+(
+	set -euo pipefail
+
+	if ! command -v copilot &> /dev/null; then
+		exit 0
+	fi
+
+	COPILOT_COMPLETION_PATH="${ZSH_COMPLETIONS_DIR}/_copilot"
+
+	if [ -r "$COPILOT_COMPLETION_PATH" ]; then
+		zstat -H COMPLETION_FILE_STAT "$COPILOT_COMPLETION_PATH"
+		zstat -H COPILOT_FILE_STAT "$(command -v copilot)"
+
+		if [ "${COMPLETION_FILE_STAT[ctime]}" -ge "${COPILOT_FILE_STAT[ctime]}" ]; then
+			exit 0
+		fi
+	fi
+
+	copilot completion zsh > "$COPILOT_COMPLETION_PATH"
+	chmod +x "$COPILOT_COMPLETION_PATH"
+)