Add week 10 challenge manwar#1 for Perl 6

Author: m-dango

challenge-010/daniel-mita/perl6/ch-1.p6

@@ -0,0 +1,27 @@
+#!/usr/bin/env perl6
+use v6;
+
+my %letters = ( Ⅰ, |( * X* Ⅴ, Ⅹ ) … * ) Z=> ｢IVXLCDM｣.comb;
+
+sub MAIN (
+  UInt:D $number where Ⅰ ≤ * < Ⅳ × Ⅹ**Ⅲ #= A positive integer.
+) {
+  say [~] gather {
+    for $number.flip.comb.pairs.reverse {
+      when .value == Ⅳ | Ⅸ {
+        take [~] ( %letters{ Ⅹ ** .key X* Ⅰ, .value + Ⅰ } );
+      }
+      if .value ≥ Ⅴ {
+        take %letters{ Ⅹ ** .key * Ⅴ };
+      }
+      take %letters{ Ⅹ ** .key } x .value % Ⅴ;
+    }
+  }
+}
+
+sub GENERATE-USAGE ( &main, |capture ) {
+  (capture.first ~~ UInt && capture.first ≥ Ⅳ × Ⅹ**Ⅲ
+    ?? "Error:\n  Support for numbers greater than MMMCMXCIX not yet implemented.\n\n"
+    !! '')
+    ~ $*USAGE;
+}