feat: Custom stack size

If a user reports a crash from stacksize - we can try different stack
memory sizes to try and figure out the cause.

Do not try and initialise rayon on 32 bit builds

Fix rayon initialisation, may not have been called before due to badly
formed closure

src/cli.rs

@@ -186,6 +186,14 @@ pub fn build_cli() -> Command {
                 .action(clap::ArgAction::SetTrue)
                 .help("Only files will be displayed. (Finds your largest files)"),
         )
+        .arg(
+            Arg::new("stack_size")
+                .short('S')
+                .long("stack-size")
+                .num_args(1)
+                .value_parser(value_parser!(usize))
+                .help("Specify memory to use as stack size - use if you see: 'fatal runtime error: stack overflow' (default low memory=1048576, high memory=1073741824)"),
+        )
         .arg(Arg::new("params").num_args(1..)
             .value_parser(value_parser!(String)))
 }