feat: Implement starship configure command (#751)

src/main.rs

@@ -4,6 +4,7 @@ extern crate clap;
 mod bug_report;
 mod config;
 mod configs;
+mod configure;
 mod context;
 mod init;
 mod module;
@@ -110,6 +111,7 @@ fn main() {
                     .arg(&keymap_arg)
                     .arg(&jobs_arg),
             )
+            .subcommand(SubCommand::with_name("configure").about("Edit the starship configuration"))
             .subcommand(SubCommand::with_name("bug-report").about(
                 "Create a pre-populated GitHub issue with information about your configuration",
             ))
@@ -137,6 +139,7 @@ fn main() {
                 print::module(module_name, sub_m.clone());
             }
         }
+        ("configure", Some(_)) => configure::edit_configuration(),
         ("bug-report", Some(_)) => bug_report::create(),
         _ => {}
     }