Update changelog for version 1.3.6 and enhance resource handling in PluginEditor and PolyPitchDetector

[leprpht]

This pull request finalizes the realtime MVP review and improves asset handling in both the plugin and UI code, while also refactoring the PitchDetector class for clarity and maintainability. The main changes are grouped below.

Realtime MVP and Asset Handling Improvements:

• Finalized the realtime MVP review, confirming that per-voice pitch stability, harmonic handling, pluck trigger separation, polyphonic continuity, and continuous input-dynamics are preserved. Automated tests for pitch, trigger, dynamics, analyzer, voice-manager, and processor have been confirmed. (CHANGELOG.md)
• Embedded UI asset URLs are now relative, and JUCE resource-provider path handling is hardened across WebView2/WebKit, preventing valid bundled assets from being reported as missing. (CHANGELOG.md, Source/PluginEditor.cpp) [1] [2]
• The Vite config for the UI sets the bundle base to "./" for robust resource-provider compatibility, and asset file naming logic is improved for CSS assets. (UI/vite.config.ts) [1] [2]

Code Quality and Refactoring:

• The PitchDetector class in Source/PolyPitchDetector.h is refactored to use consistent brace and formatting style (K&R), with improved clarity and modern C++ idioms. All methods are now defined inline, and conditionals are simplified for readability and maintainability. (Source/PolyPitchDetector.h) [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]