Project restructuring (fixes macOS builds) (#198)

- Create `Include/` folder for all main projects
- Fix some issues here and there (found while moving things)
- All includes are now in `Tactility/` subfolder and must be included with that prefix. This fixes issues with clashing POSIX headers (e.g. `<semaphore.h>` versus Tactility's `Semaphore.h`)

TactilityHeadless/Include/Tactility/hal/i2c/I2cCompat.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#ifdef ESP_PLATFORM
+#include <hal/i2c_types.h>
+#include <driver/i2c.h>
+#else
+
+#include <cstdint>
+
+typedef int esp_err_t;
+
+typedef enum {
+    I2C_NUM_0 = 0,
+    I2C_NUM_1,
+    LP_I2C_NUM_0,
+    I2C_NUM_MAX,
+} i2c_port_t;
+
+typedef enum{
+    I2C_MODE_MASTER,
+    I2C_MODE_MAX,
+} i2c_mode_t;
+
+typedef struct {
+    i2c_mode_t mode;
+    int sda_io_num;
+    int scl_io_num;
+    bool sda_pullup_en;
+    bool scl_pullup_en;
+
+    union {
+        struct {
+            uint32_t clk_speed;
+        } master;
+    };
+    uint32_t clk_flags;
+} i2c_config_t;
+
+#endif