Memory optimization & external components

Helps with #1686
- This is deprecating Relay local fallback switches (replaced by globals) to save memory.
- Using reboot timeout from ESPHome instead of custom engine
- Do not change page is already there.
- Use of external components to streamline some repetitive code
- API always transfer colors in RGB array to keep consistency

esphome/components/nspanel_ha_blueprint/text.h

@@ -0,0 +1,48 @@
+// text.h
+#pragma once
+
+#include <cstring>
+#include <string>
+
+namespace nspanel_ha_blueprint {
+
+    /**
+     * Copies the contents of a std::string to a fixed-size char array, ensuring
+     * null termination of the string within the array. This function template
+     * automatically deduces the size of the destination char array at compile time,
+     * minimizing the risk of buffer overflow. It's designed for use with fixed-size
+     * char arrays only, not pointers or dynamically allocated memory.
+     * 
+     * Template Parameter:
+     * N - The size of the destination char array. This value is deduced automatically
+     *     and must be greater than 0.
+     * 
+     * Parameters:
+     * dest - A reference to the destination char array where the string should be copied.
+     *        The array must have a size that can accommodate the source string plus a
+     *        null terminator. If the source string is longer than the destination array,
+     *        it will be truncated.
+     * src - The source std::string to copy. This string's contents are copied into the
+     *       destination array up to the array's capacity minus one, to leave space for
+     *       the null terminator.
+     * 
+     * Usage Example:
+     * char destination[11];
+     * std::string source = "Hello";
+     * nspanel_ha_blueprint::copyStringToCharArray(destination, source);
+     * 
+     * Note: The destination array is always null-terminated, even if the source string
+     * is truncated to fit into the array.
+     */
+    template<size_t N>
+    void copyStringToCharArray(char (&dest)[N], const std::string& src) {
+        static_assert(N > 0, "Destination array size must be greater than 0.");
+
+        // Copy up to N - 1 characters to ensure there's room for the null terminator
+        std::strncpy(dest, src.c_str(), N - 1);
+
+        // Manually null-terminate the destination array
+        dest[N - 1] = '\0';
+    }
+
+}  // namespace nspanel_ha_blueprint