Update XML documents to pml 0.3.0

[jabrena]

[coderabbitai]

A summary of the changes CodeRabbit can apply:

• Update system-prompts-generator/src/test/java/info/jab/pml/RemoteSchemaValidationTest.java by changing the REMOTE_XSD constant from https://jabrena.github.io/pml/schemas/0.1.0/pml.xsd to https://jabrena.github.io/pml/schemas/0.3.0/pml.xsd so the parameterized test validates all 26 XML prompt files against PML schema v0.3.0.

• Update RemoteSchemaValidationTest to point its REMOTE_XSD constant to the newer pml.xsd version by changing the URL from ".../0.1.0/pml.xsd" to ".../0.3.0/pml.xsd", so tests validate against the 0.3.0 schema.

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[jabrena]

Refactor documents which includes: <instructions>

hint: https://github.com/search?q=repo%3Ajabrena%2Fcursor-rules-java+%3Cinstructions%3E&type=code

[jabrena]

#414