Limiter filter outputCeiling + attackTime

[alnitak]

Description

closes #169

Typically, Limiter filters have an output ceiling value.

This creates a hard limit, ensuring protection against clipping audio, so long as the Limiter is placed last in the output chain.

For example, setting the output ceiling to -0.1 would typically prevent any audio clipping from taking place.

• added outputCeiling parameter
• removed makeupGain
• added attackTime parameter to smooth the onset of limiting
• example filters/limiter.dart updated

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore