Add titles command to show all IDs and titles

Signed-off-by: Oliver Davies <oliver@oliverdavies.uk>

internal/lib/git.go

@@ -0,0 +1,12 @@
+package lib
+
+import "os/exec"
+
+func execGitCommand(dir string, parts ...string) (string, error) {
+	args := append([]string{"-C", dir}, parts...)
+	command := exec.Command("git", args...)
+
+	output, err := command.CombinedOutput()
+
+	return string(output), err
+}