Improve plugin load and unload ordering

[RhysB]

📌 Pull Request

Description

Improve plugin load, enable, and disable ordering by introducing a plugin load order planner.

Behaviour:

• Plans the plugin load order utilizing the plugin.yml information.
• Makes the load order deterministic to prevent OS/Java types from effecting load order.
• Priority hard dependencies over soft dependencies where possible.
• Disable plugins in the reverse order.

Related Issues / Discussions

Fixes issues discussed in the RetroMC Discord with Zavdav and RobertWesner

• Fixes #
• Related to #

Motivation & Context

Fixes several bugs regarding plugin loading, enabling, and disabling.

Type of Change

Please tick all that apply:

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ⚡ Performance improvement
• 🧩 New feature (non-breaking)
• 🔧 Refactor / cleanup (no functional changes)
• 🔥 Crash / exploit fix
• 📚 Documentation update
• ❗ Breaking change (may affect plugins or server behavior)

Testing Performed

• Compiled successfully with mvn clean package
• Tested on a Beta 1.7.3 server
• Existing functionality verified
• Edge cases considered

Test details:

- Tested on the RetroMC development server with approx 70 plugins.
- PR resolves load issues we have previously had with some of our plugins.

Compatibility Considerations

• No known compatibility impact
• Potential plugin impact (described below)
• Network / protocol (Netcode) behavior changed
• Configuration change required

Compatibility Notes

This PR shouldn't break compatibility of plugins with correct plugin.yml files.

Checklist

Please confirm the following:

• No unnecessary formatting or whitespace-only changes
• Changes are compatible with Minecraft Beta 1.7.3
• No dependencies have been added without discussion with the RetroMC team

[RobertWesner]

Works, but the code has some minor edges that we might want to change.