Add firmware slices 1–2: skeleton and Wi-Fi provisioning

Implement ESP-IDF walking skeleton with SoftAP, health API, and host
tests, then Slice 2 ISecureStore/NvsSecureStore, STA join, POST
/api/wifi, and the provisioning web UI.

Co-authored-by: Cursor <cursoragent@cursor.com>

Software/components/net/src/SoftApConfig.cpp

@@ -0,0 +1,58 @@
+/**
+ * @file    SoftApConfig.cpp
+ * @brief   SoftApConfig implementation.
+ *
+ * DigiRadio firmware — https://github.com/manvalan/DigiRadio
+ *
+ * Copyright 2026 Michele Bigi
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * @author  Michele Bigi
+ * @date    2026-07-06
+ */
+
+#include "net/SoftApConfig.hpp"
+
+namespace net {
+
+namespace {
+constexpr std::string_view kSetupSsid = "DigiRadio-setup";
+constexpr std::uint8_t kSetupChannel = 1;
+constexpr std::uint8_t kSetupMaxConnections = 4;
+} // namespace
+
+SoftApConfig SoftApConfig::setupDefault()
+{
+    return SoftApConfig(kSetupSsid, kSetupChannel, kSetupMaxConnections);
+}
+
+SoftApConfig::SoftApConfig(std::string_view ssid,
+                           std::uint8_t channel,
+                           std::uint8_t maxConnections)
+    : ssid_(ssid)
+    , channel_(channel)
+    , maxConnections_(maxConnections)
+{
+}
+
+std::string_view SoftApConfig::ssid() const noexcept
+{
+    return ssid_;
+}
+
+std::uint8_t SoftApConfig::channel() const noexcept
+{
+    return channel_;
+}
+
+std::uint8_t SoftApConfig::maxConnections() const noexcept
+{
+    return maxConnections_;
+}
+
+} // namespace net