Improve sharpness removal: re-enable Sharpness field...

[Koeleskab]

...override and change default behavior to sharpness off

• Uncomment and enable Sharpness field to apply sharpness values
• UI toggle sets sharpness to 1.0 when enabled, 0.0 when disabled. Defaults to disable.
• Removed broken + redundant slider.
• Initialize wanted_sharpness to 0.0 to conform with user expected behavior when using sharpness removal
• Remove debug_disable flag for simpler code

This ensures intuitive default behavior when moved to autorun or manually run and simplifies user-configuration.

[Koeleskab]

My refactoring of the UI was based on a misconception due to a discrepancy in how RE3 and RE2 handle the sharpness value. I was a bit quick on the trigger. But did some direct object inspection in REFramework yesterday.

The actual problem was that RE2 allows setting sharpness on TaaStrength.disabled while it doesn't on TaaStrength.strong. When sharpness gets set to 1 in Re2 while TaaStrength.disable is also set, the field actually gets set to TaaStrength.Legacy. Re3 ignores the wanted_sharpness value and just enacts sharpness based on TaaStrength enum except when it's set to manual or Legacy explicitly.

so the fix seems to be: wanted_sharpness = 0 when TaaStrength.Disabled. That way both games work. Table for clarity:

Scenario	Input: TAA Enum	Input: Sharpness	RE2 Result	RE3 Result
TAA Enabled	Strong	0.0 - 1.0	Locked: Enforces 0.5 sharpness; ignores user input.	Locked: Enforces 0.5 sharpness; ignores user input.
TAA Disabled	Disable	1.0	Conflict: Interprets this as Legacy TAA.	Clean: TAA is off; image is sharpened.
Current Fix	Disable	0.0	disables TAA without triggering Legacy mode.	disables TAA;

My PR might be a tad overkill, but it does set a clear behavior for both games that fit the expectation of the mod, at the loss of already removed slider-control.