[FL-1911] FuriHal: i2c refactoring (#847)

* Project: fix release build, replace asserts with checks.
* FuriHal: i2c refactoring, new bus access model, flexible bus gpio configuration.
* FuriHal: set i2c pins to high on detach.
* FuriHal: more i2c bus events, put bus under reset when not used, move bus enable/disable routine to bus handler.
* FuriHal: fix i2c deadlock in power api, add external i2c handle.

firmware/targets/f7/furi-hal/furi-hal-i2c-config.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <furi-hal-i2c-types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Internal(power) i2c bus, I2C1, under reset when not used */
+extern FuriHalI2cBus furi_hal_i2c_bus_power;
+
+/** External i2c bus, I2C3, under reset when not used */
+extern FuriHalI2cBus furi_hal_i2c_bus_external;
+
+/** Handle for internal(power) i2c bus
+ * Bus: furi_hal_i2c_bus_external
+ * Pins: PA9(SCL) / PA10(SDA), float on release
+ * Params: 400khz
+ */
+extern FuriHalI2cBusHandle furi_hal_i2c_handle_power;
+
+/** Handle for external i2c bus
+ * Bus: furi_hal_i2c_bus_external
+ * Pins: PC0(SCL) / PC1(SDA), float on release
+ * Params: 100khz
+ */
+extern FuriHalI2cBusHandle furi_hal_i2c_handle_external;
+
+#ifdef __cplusplus
+}
+#endif