LSP Plugins 1.2.0 released.

Release 1.2.0.

• Decomposition of core modules into submodules.
• Implemented multiple visual themes for the plugins.
• Added possibility to change visual themes in runtime.
• Added headless support for JACK plugins.
• Fixed delay compensation issue for Dry/Wet balance for single-banded dynamic plugin series
  (Compressor/Gate/Expander/Dynamic Processor).
• Add support of LV2UI:scaleFactor extension - https://github.com/drobilla/lv2/pull/38/commits
• Implemented 'Reset to default' button.
• Added support of building under LoongArch32 and LoongArch64 architectures.
• Added support of building under 32-bit and 64-bit RISC-V architectures.