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.

src/relay_chn_run_info.c

@@ -0,0 +1,74 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Kozmotronik Tech
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "relay_chn_core.h"
+#include "relay_chn_run_info.h"
+
+
+#if RELAY_CHN_COUNT > 1
+static relay_chn_run_info_t run_infos[RELAY_CHN_COUNT];
+#else
+static relay_chn_run_info_t run_info;
+#endif
+
+void relay_chn_run_info_init()
+{
+#if RELAY_CHN_COUNT > 1
+    for (int i = 0; i < RELAY_CHN_COUNT; i++) {
+        run_infos[i].last_run_cmd = RELAY_CHN_CMD_NONE;
+        run_infos[i].last_run_cmd_time_ms = 0;
+    }
+#else
+    run_info.last_run_cmd = RELAY_CHN_CMD_NONE;
+    run_info.last_run_cmd_time_ms = 0;
+#endif
+}
+
+#if RELAY_CHN_COUNT > 1
+relay_chn_run_info_t *relay_chn_run_info_get(uint8_t chn_id)
+{
+    if (!relay_chn_is_channel_id_valid(chn_id)) {
+        return NULL;
+    }
+    return &run_infos[chn_id];
+}
+
+relay_chn_run_info_t *relay_chn_run_info_get_all()
+{
+    return run_infos;
+}
+#else
+relay_chn_run_info_t *relay_chn_run_info_get()
+{
+    return &run_info;
+}
+#endif // RELAY_CHN_COUNT > 1
+
+relay_chn_cmd_t relay_chn_run_info_get_last_run_cmd(relay_chn_run_info_t *run_info)
+{
+    return run_info == NULL ? RELAY_CHN_CMD_NONE : run_info->last_run_cmd;
+}
+
+void relay_chn_run_info_set_last_run_cmd(relay_chn_run_info_t *run_info, relay_chn_cmd_t cmd)
+{
+    if (!run_info) {
+        return;
+    }
+    run_info->last_run_cmd = cmd;
+}
+
+uint32_t relay_chn_run_info_get_last_run_cmd_time_ms(relay_chn_run_info_t *run_info)
+{
+    return run_info == NULL ? 0 : run_info->last_run_cmd_time_ms;
+}
+
+void relay_chn_run_info_set_last_run_cmd_time_ms(relay_chn_run_info_t *run_info, uint32_t time_ms)
+{
+    if (!run_info) {
+        return;
+    }
+    run_info->last_run_cmd_time_ms = time_ms;
+}