refactor to decouple commands form entrypoint for reusability and centralizing commands.

Increase reusability and composition

pkg/repl/executor.go

@@ -0,0 +1,49 @@
+package repl
+
+import (
+	"os/exec"
+	"strings"
+
+	"github.com/LazyBachelor/LazyPM/internal/commands/issues"
+)
+
+// execute processes the input command and returns the output
+func execute(input string) (string, error) {
+	if input == "" {
+		return "", nil
+	}
+
+	if input == "help" {
+		return ReplHelp, nil
+	}
+
+	if input == "title" {
+		return ReplTitle, nil
+	}
+
+	if after, ok := strings.CutPrefix(input, "pm"); ok {
+		return executePMCommand(after)
+	}
+	return executeShellCommand(input)
+}
+
+func executeShellCommand(input string) (string, error) {
+	parts := strings.Fields(input)
+	if len(parts) == 0 {
+		return "", nil
+	}
+
+	cmd := exec.Command(parts[0], parts[1:]...)
+	output, err := cmd.CombinedOutput()
+	return string(output), err
+}
+
+func executePMCommand(input string) (string, error) {
+	parts := strings.Fields(input)
+	if len(parts) == 0 {
+		return "", nil
+	}
+
+	output, err := issuesCmd.ExecuteArgsString(parts)
+	return output, err
+}