TactilityKernel improvements (#464)

* **New Features**
  * Thread API with lifecycle, priority, affinity and state monitoring
  * Timer subsystem: one-shot/periodic timers, reset, pending callbacks, expiry queries
  * Expanded I²C: register-level ops, bulk writes, presence checks, ESP32 integration and new config properties
  * GPIO controller: pin level and options APIs
  * Error utilities: new error code, error-to-string, timeout helper and common macros
  * Device construction helpers (construct+start)

* **Tests**
  * New unit tests for thread and timer behavior

* **Documentation**
  * Expanded coding style guide (files/folders, C conventions)

Tactility/Include/Tactility/hal/i2c/I2c.h

@@ -14,7 +14,6 @@ constexpr TickType_t defaultTimeout = 10 / portTICK_PERIOD_MS;
 
 enum class InitMode {
     ByTactility, // Tactility will initialize it in the correct bootup phase
-    ByExternal, // The device is already initialized and Tactility should assume it works
     Disabled // Not initialized by default
 };
 
@@ -39,15 +38,6 @@ enum class Status {
     Unknown
 };
 
-/**
- * Reconfigure a port with the provided settings.
- * @warning This fails when the HAL Configuration is not mutable.
- * @param[in] port the port to reconfigure
- * @param[in] configuration the new configuration
- * @return true on success
- */
-bool configure(i2c_port_t port, const i2c_config_t& configuration);
-
 /**
  * Start the bus for the specified port.
  * Devices might be started automatically at boot if their HAL configuration requires it.
@@ -60,6 +50,9 @@ bool stop(i2c_port_t port);
 /** @return true if the bus is started */
 bool isStarted(i2c_port_t port);
 
+/** @return name or nullptr */
+const char* getName(i2c_port_t port);
+
 /** Read bytes in master mode. */
 bool masterRead(i2c_port_t port, uint8_t address, uint8_t* data, size_t dataSize, TickType_t timeout = defaultTimeout);