- 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/esp-dsp/test_app/Makefile

@@ -0,0 +1,13 @@
+#
+# This is a project Makefile for the test subproject.
+#
+
+PROJECT_NAME := test_app
+
+# Include the components directory of the main application:
+#
+EXTRA_COMPONENT_DIRS := $(realpath ..)
+EXCLUDE_COMPONENTS := test_app
+TEST_COMPONENTS ?= esp-dsp
+
+include $(IDF_PATH)/make/project.mk