Add short country code source setup

dev/DataSource/CountryShort/CountryAlpha2Source.php

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+<?php
+declare(strict_types=1);
+
+namespace PrinsFrank\Standards\Dev\DataSource\CountryShort;
+
+use PrinsFrank\Standards\CountryShort\CountryAlpha2;
+use PrinsFrank\Standards\Dev\DataSource\Country\ISO3166_1_Alpha_2_Source;
+
+class CountryAlpha2Source extends ISO3166_1_Alpha_2_Source
+{
+    public static function getSpecFQN(): string
+    {
+        return CountryAlpha2::class;
+    }
+}

dev/DataSource/CountryShort/CountryAlpha3Source.php

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+<?php
+declare(strict_types=1);
+
+namespace PrinsFrank\Standards\Dev\DataSource\CountryShort;
+
+use PrinsFrank\Standards\CountryShort\CountryAlpha3;
+use PrinsFrank\Standards\Dev\DataSource\Country\ISO3166_1_Alpha_3_Source;
+
+class CountryAlpha3Source extends ISO3166_1_Alpha_3_Source
+{
+    public static function getSpecFQN(): string
+    {
+        return CountryAlpha3::class;
+    }
+}

dev/DataSource/CountryShort/CountryNameSource.php

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+<?php
+declare(strict_types=1);
+
+namespace PrinsFrank\Standards\Dev\DataSource\CountryShort;
+
+use PrinsFrank\Standards\CountryShort\CountryName;
+use PrinsFrank\Standards\Dev\DataSource\Country\ISO3166_1_Name_Source;
+
+class CountryNameSource extends ISO3166_1_Name_Source
+{
+    public static function getSpecFQN(): string
+    {
+        return CountryName::class;
+    }
+}

dev/DataSource/CountryShort/CountryNumericSource.php

@@ -0,0 +1,15 @@
+<?php
+declare(strict_types=1);
+
+namespace PrinsFrank\Standards\Dev\DataSource\CountryShort;
+
+use PrinsFrank\Standards\CountryShort\CountryNumeric;
+use PrinsFrank\Standards\Dev\DataSource\Country\ISO3166_1_Numeric_Source;
+
+class CountryNumericSource extends ISO3166_1_Numeric_Source
+{
+    public static function getSpecFQN(): string
+    {
+        return CountryNumeric::class;
+    }
+}