refactor(lookat): Simplify pitch, fov, zoom logic in LookAtTranslator

[xezon]

This change simplifies the pitch, fov and zoom logic in LookAtTranslator for ease of read.

TODO

• Replicate in Generals

[greptile-apps]

Greptile Summary

This PR refactors camera control logic in LookAtTranslator to improve code clarity and eliminate unnecessary loops. The changes include: (1) renaming FACTOR to Scale with constexpr const qualifier for pitch and FOV calculations, (2) replacing loop-based mouse wheel zoom with direct multiplication (mathematically equivalent since View::zoom() is additive), and (3) improving control flow by consolidating else if and moving comments inside code blocks. All changes are behavior-preserving refactorings that reduce line count from 52 to 28 lines while maintaining identical functionality.

Confidence Score: 5/5

• This PR is safe to merge with no risk - pure refactoring with verified logic equivalence
• All changes are straightforward code simplifications with mathematically equivalent logic. The zoom calculation was verified to be equivalent (multiple additive calls = single sum call), variable declarations are improved with const/constexpr, and formatting changes enhance readability without altering behavior.
• No files require special attention

Important Files Changed

Filename	Overview
Generals/Code/GameEngine/Source/GameClient/MessageStream/LookAtXlat.cpp	Refactored pitch/FOV scaling, simplified mouse wheel zoom from loops to direct multiplication, improved comment placement and control flow formatting
GeneralsMD/Code/GameEngine/Source/GameClient/MessageStream/LookAtXlat.cpp	Identical refactoring to Generals version: improved scaling constants, simplified zoom calculation, and better control flow structure

_{Last reviewed commit: 7323417}

[Skyaero42]

Looks good

[xezon]

Replicated in Generals without conflicts.