- merge with original master from jorgen

- minimize RAM usage of all components
- use both IRAM and DRAM in player component so we can buffer up to 1s on modules without SPI RAM
- support fragemented pcm chunks so we can use all available RAM if there isn't a big enough block available but still enough HEAP
- reinclude all components from jorgen's master branch
- add custom i2s driver to get a precise timing of initial sync
- change wrong usage of esp_timer for latency measurement of snapcast protocol
- add player component

components/dsp_processor/CMakeLists.txt

@@ -0,0 +1,10 @@
+set(COMPONENT_REQUIRES)
+set(COMPONENT_PRIV_REQUIRES audio_board audio_sal audio_hal esp-dsp)
+
+list(APPEND COMPONENT_ADD_INCLUDEDIRS ./include)
+set(COMPONENT_SRCS ./dsp_processor.c)
+register_component()
+
+# IDF >=4
+idf_component_get_property(audio_board_lib audio_board COMPONENT_LIB)
+set_property(TARGET ${audio_board_lib} APPEND PROPERTY INTERFACE_LINK_LIBRARIES ${COMPONENT_LIB})