feat: Basic File implementation

[NexelOfficial]

Added some basic File classes to support file reading and writing. Added the following classes:

• java.io.File
• java.io.FileReader
• java.io.FileWriter
• java.util.Scanner

This should provide the basic File reader and writing needs that are crucial for plugin development.

Example file reading implementation:

import { ServerCommands } from "@customrealms/core";

ServerCommands.register("/log-properties", () => {
  const serverPropsFile = new java.io.File("server.properties");
  const propsScanner = new java.util.Scanner(serverPropsFile);

  while (propsScanner.hasNextLine()) {
    const nextLine = propsScanner.nextLine();
    console.log(nextLine);
  }
});

Example file writing implementation:

import { ServerCommands } from "@customrealms/core";

ServerCommands.register("/write-file", () => {
  const file = new java.io.File("test-document.txt");
  const writer = new java.io.FileWriter(file);
  writer.write("This is some example text!");
  writer.close();
});

[connerdouglass]

You're free to merge this whenever you're ready 🚀

[NexelOfficial]

You're free to merge this whenever you're ready 🚀

I don't have write access to the repository :o

[connerdouglass]

Oh, I thought you would be able to merge an approved PR. I'll look into that later, but merge this one myself 👍