Feature/prototypes

[Hari-696]

Filters Added

• BandParams structure for frequency, gain, and Q.
• targetBands + startBands for smooth transitions between presets.
• CompactPreset format with categories, names, and suitability weights.
• Preset system
• Adaptive selection based on audio analysis.
• Smooth transitions (cosine interpolation over TRANSITION_SAMPLES).
• Active preset tracking (getActivePreset()).
• Utility functions
• applyRelativeGain() for global scaling.
• setFilterBypass() for disabling bands cleanly.

Computational Changes

• Refactored BiquadFilter
• Explicit separation of feedforward vs feedback coefficients.
• Coefficient recalculation during transitions.
• AudioAnalysis subsystem
• Rolling buffer of last ANALYSIS_SIZE samples.
• RMS, peak, spectral centroid, bass/mid/treble energy extraction.
• Processing pipeline changes
• Real-time analysis executed alongside filtering.
• Preset transition updates integrated into process().
• Soft clipping safety limiter using tanhf.
• C interface extensions
• New exports: preset loading, adaptive selection, audio analysis retrieval.
• Performance optimizations
• Clamp macro for environments without .
• Precomputed interpolation factors for smoother transitions.

[BennyPerumalla]

@Hari-696 Please provide description for the changes you made

• Filters added
• Computational changes

Give one commit per root directory, fixup the present commits