Add additional platforms support for DocBlockParser::createDefault() method in docs

Author: SerafimArts

docs/Writerside/topics/phpdoc/custom-tags.md

@@ -147,9 +147,16 @@ The built-in <code>StandardPlatform</code> is always loaded first, so every
 standard tag stays available; a platform passed in only adds to it, or overrides
 an entry when it reuses a name. The other built-in families (phpDocumentor,
 Psalm, PHPStan, Phan, PhpStorm, PHP CodeSniffer) are <b>not</b> loaded by the
-constructor — list them alongside your own platform when you need them, or see
-<a href="platforms.md"><code>DocBlockParser::createDefault()</code></a> for the
-full built-in set.
+constructor. To get the full built-in set together with your own platform, pass
+it to
+<a href="platforms.md"><code>DocBlockParser::createDefault()</code></a> via its
+<code>$additionalPlatforms</code> argument:
+
+<code-block lang="php">
+$parser = DocBlockParser::createDefault(additionalPlatforms: [
+    new MoneyPlatform(),
+]);
+</code-block>
 </note>
 
 ## Where to Go Next

docs/Writerside/topics/phpdoc/platforms.md

@@ -69,8 +69,16 @@ factory:
 $parser = DocBlockParser::createDefault();
 </code-block>
 
-To register your own platform on top of the built-in tool families, list them
-together in the constructor rather than passing yours alone.
+To register your own platform on top of the built-in tool families, pass it to
+<code>createDefault()</code> via the <code>$additionalPlatforms</code> argument —
+it is appended after the built-in platforms, so it extends them and overrides an
+entry only when it reuses the same name:
+
+<code-block lang="php">
+$parser = DocBlockParser::createDefault(additionalPlatforms: [
+    new MoneyPlatform(),
+]);
+</code-block>
 </note>
 
 The definitions that end up registered are exposed as `$parser->tags` (a