Added Unicode Support via utf-8 specification

[KennethNero]

Fix Unicode encoding issues in NBT data transmission to Python

Summary

Fixes incorrect encoding when transmitting NBT data containing Unicode characters from Java to Python subprocess, which caused mojibake (e.g., ⚎ appearing as ⚎).

Problem

Fixes #59

When SubprocessTask writes JSON data containing Unicode characters to Python's stdin, it uses OutputStreamWriter without specifying a charset. On Windows, this defaults to Windows-1252/CP1252 instead of UTF-8, causing Unicode characters in book NBT data to be corrupted.

Example:

• Expected: ⚎⚎⚎ (U+26CE)
• Actual: ⚎⚎⚎ (UTF-8 bytes misinterpreted as Windows-1252)

Solution

Explicitly specify StandardCharsets.UTF_8 when creating:

1. OutputStreamWriter for subprocess stdin (writing to Python)
2. InputStreamReader for subprocess stdout (reading from Python)
3. InputStreamReader for subprocess stderr (reading from Python)

Changes

• common/src/main/java/net/minescript/common/SubprocessTask.java:
  • Added import java.nio.charset.StandardCharsets;
  • Modified line 48: new OutputStreamWriter(process.getOutputStream(), StandardCharsets.UTF_8)
  • Modified line 54: new InputStreamReader(process.getInputStream(), StandardCharsets.UTF_8)
  • Modified line 87: new InputStreamReader(process.getErrorStream(), StandardCharsets.UTF_8)

All Unicode characters now transmit correctly to Python scripts.

Additional Notes

This is a platform-specific bug that primarily affects Windows users, where the default charset is not UTF-8. Linux/Mac users were unaffected as their default is already UTF-8.

[KennethNero]

After thorough testing - also modified minescript_runtime.py to ensure that the java encoding doesn't fall off due to python's interpretation.