Implement JASS PRNG interpreter natives

[Frotty]

What changed

• Added the Warcraft III JASS PRNG implementation used by SetRandomSeed, GetRandomInt, and GetRandomReal.
• Replaced the interpreter's nondeterministic Java Random implementation with deterministic JASS-compatible state.
• Added regression coverage for the reference integer sequence, float bit patterns, equal bounds, and reversed integer bounds.

Validation

• Standalone Java compilation of JassPrng.java passed.
• Reference seed 12345 matched the supplied Warcraft integer sequence: 189832, 638801, 925099.
• Full Gradle compilation remains blocked by pre-existing unresolved conflict markers in SyntacticSugar.java, outside this PR's staged files.