Update Data Center for Unity 6000.4.12

[BloddyMichi]

Summary

• Update Data Center compatibility text from Unity 6000.4.2f1 / MelonLoader 0.7.2 to Unity 6000.4.12f1 / MelonLoader 0.7.3, while documenting support as Unity 6000.x / MelonLoader 0.7.x.
• Carry forward the current WorldInspector improvements for center-aim selection and Data Center object scoring.
• Add OptionsPanel changes from the current working branch.
• Centralize Unity 6000 safe UI fallback helpers for C# Console, Hook Editor and Generic Arguments.
• Improve install-datacenter.ps1 with dry-run output, wait-for-exit mode, MelonLoader preflight, running-process detection, locked-file checks and duplicate-file warnings.
• Add collect-datacenter-logs.ps1 to create a support ZIP with Latest.log, UnityExplorer logs, detected runtime versions and installed DLL hashes.
• Add a manual GitHub Actions release workflow for Data Center CoreCLR builds.
• Keep the branch based directly on current main to avoid the conflicting old PR branch.

Verification

• Local log check: current Data Center reports Unity 6000.4.12f1 and MelonLoader v0.7.3 Open-Beta.
• powershell -ExecutionPolicy Bypass -File .\build-datacenter.ps1 succeeded with 0 warnings and 0 errors.
• powershell -ExecutionPolicy Bypass -File .\install-datacenter.ps1 -GameDir "C:\Program Files (x86)\Steam\steamapps\common\Data Center" -BuildIfMissing -DryRun succeeded and printed planned SHA256 hashes without copying files.
• powershell -ExecutionPolicy Bypass -File .\collect-datacenter-logs.ps1 -GameDir "C:\Program Files (x86)\Steam\steamapps\common\Data Center" created a support ZIP successfully.
• PowerShell syntax checks for install-datacenter.ps1 and collect-datacenter-logs.ps1 passed.
• git diff --cached --check passed.

Runtime note

The freshly built files are installable from the local Release output. Data Center still needs an in-game restart/log verification after merging or installing this PR build.