add the schema subcommand

lib/App/Changelord.pm

@@ -8,10 +8,11 @@ use YAML;
 
 option source => (
     is => 'ro',
+    doc => 'changelog yaml file',
     default => 'CHANGELOG.yml',
 );
 
-option changelog => (
+has changelog => (
     lazy => 1,
     is => 'ro',
     default => sub($self) {
@@ -57,4 +58,6 @@ sub run($self) {
     print $self->as_markdown;
 }
 
+subcommand 'schema' => 'App::Changelord::Command::Schema';
+
 'end of App::Changeman';

lib/App/Changelord/Command/Schema.pm

@@ -0,0 +1,29 @@
+package App::Changelord::Command::Schema;
+# SYNOPSIS: print out the changelog schema
+
+use 5.36.0;
+
+use Moo;
+use CLI::Osprey;
+
+use Path::Tiny;
+use JSON;
+use YAML;
+
+option json => (
+    is => 'ro',
+    default => 0,
+    doc => 'output schema as json',
+);
+
+sub run($self) {
+
+    my $schema = path(__FILE__)->sibling('changelog-schema.yml')->slurp;
+
+    $schema = JSON->new->pretty->encode(YAML::Load($schema));
+
+    print $schema;
+
+}
+
+'end of App::Changelog::Command::Schema';