Add single channel mode feature.

The addition of a single-channel mode implied further modularisation of the component. This commit has broken the component down into the following modules to avoid a huge single source file and to make unit testing easier.

The modules:

- Separation of public and private code
- *types and *defs
- public relay_chn API
- *adapter
- *output
- *run_info
- *core
- *ctl (control)
- *tilt

Closes #957.

private_include/relay_chn_tilt.h

@@ -0,0 +1,58 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Kozmotronik Tech
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include "relay_chn_priv_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Initialize relay channel tilt controls.
+ *
+ * Sets up tilt functionality for relay channels including timers and event handlers.
+ * Must be called before using any other tilt functions.
+ *
+ * @param[in] chn_ctls Array of relay channel control structures.
+ * 
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_tilt_init(relay_chn_ctl_t *chn_ctls);
+
+/**
+ * @brief Deinitialize relay channel tilt controls.
+ *
+ * Cleans up tilt resources including timers and event handlers.
+ * Should be called when tilt functionality is no longer needed.
+ */
+void relay_chn_tilt_deinit(void);
+
+/**
+ * @brief Dispatch a tilt command to a relay channel.
+ * 
+ * Queues a tilt command for execution on the specified channel.
+ *
+ * @param[in] tilt_ctl Pointer to tilt control structure.
+ * @param[in] cmd Tilt command to execute.
+ * 
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_tilt_dispatch_cmd(relay_chn_tilt_ctl_t *tilt_ctl, relay_chn_tilt_cmd_t cmd);
+
+/**
+ * @brief Reset tilt counters for a relay channel.
+ *
+ * Resets both forward and reverse tilt counters to zero.
+ *
+ * @param[in] tilt_ctl Pointer to tilt control structure.
+ */
+void relay_chn_tilt_reset_count(relay_chn_tilt_ctl_t *tilt_ctl);
+
+#ifdef __cplusplus
+}
+#endif