feat: add tilt shift effect

[damienmontastier]

This component introduces the TiltShift effect, which provides an abstraction for applying a tilt-shift effect, simulating a shallow depth of field. The <TiltShiftPmndrs> effect is specifically designed to add dynamic and immersive visual effects by blurring parts of the scene, enhancing artistic quality and realism.

• Easy to set up — simply include it in your <EffectComposerPmndrs> pipeline.
• Multiple options for controlling focus area, feather, and blend functions are available.
• Fully supports different blend functions for enhanced customization.

For more details, see TiltShiftEffect on pmndrs/postprocessing.

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