Added HAL docs, improved HAL init&locking (#218)

TactilityHeadless/Private/Tactility/hal/i2c/I2cInit.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "Tactility/hal/i2c/I2c.h"
+#include <vector>
+
+namespace tt::hal::i2c {
+
+/**
+ * Called by main HAL init to ready the internal state of the I2C HAL.
+ * @param[in] configurations HAL configuration for a board
+ * @return true on success
+ */
+bool init(const std::vector<i2c::Configuration>& configurations);
+
+}