Soft refactor of SAM to align with rewrite

[LTS-FFXIV]

This pull request includes several changes to the SAM_Default class in the BasicRotations/Melee directory. The changes focus on improving code readability and updating default configuration settings.

Configuration Updates:

• Changed the default value of HiganbanaTargets to true to prevent Higanbana use if there is more than one target.

Code Readability Improvements:

• Renamed variables from IsTargetBoss and IsTargetDying to isTargetBoss and isTargetDying for consistency with camelCase naming conventions. [1] [2] [3] [4]
• Replaced square brackets with curly braces in the SamBuffs array initialization for better readability.
• Other misc general fixes.