Prepare P3RFix 1.4.0

[dev-camo]

Prepare P3RFix 1.4.0 with corrected menu texture scaling, safer raw mouse input, earlier independent hook installation, and consolidated release licenses.

• Calculate automatic menu texture scaling from effective viewport height. Keep the native baseline below 1080p, honor explicit user multipliers, and reject invalid or overflowing target dimensions.
• Validate both raw-input reads and packet bounds before parsing mouse movement. Failed or incomplete reads leave movement unchanged; existing sensitivity and mouse flag handling are preserved.
• Attempt independent fixes before the optional console discovery wait, so console retries do not delay intro skipping and mouse hook installation.
• Include one complete LICENSES document in both release ZIPs, with all maintained license texts and package-content checks. Existing binary installation destinations remain compatible.
• Add focused scaling and packet-reader tests to debug and release CI, update the 1.4.0 documentation, and remove the completed plan and temporary validation document.

Validation:

• Windows x64 MSVC debug and release plugin builds passed. Each mode passed 69/69 Unreal integration checks, 35/35 fix behavior checks, and the minimal source inventory.
• A temporary harness using the production hook bodies passed 8/8 checks for startup ordering, console retry behavior, message forwarding, and render-write boundaries.
• License generation and archive failure-path checks passed. Both packaged ZIPs passed independent content inspection; PowerShell lint reported no warnings or errors.
• GitHub Windows CI passed the source inventory, both test modes, release packaging, and artifact upload.
• The maintainer confirmed that all planned game and installation checks passed and approved cleanup. Detailed session logs and visual captures were not retained.

Ready for human review. No release tag or publication is included in this PR.