Improve sample applications (#2756)

This PR updates all the main Sming samples to try and demonstrate best practice when coding Sming applications. Specifically:

- Initialise timers using templated methods where possible as this provides static range check on values
- Using `SimpleTimer` is sufficient in most cases. This is both more efficient and avoids complication where compiler cannot distinguish between delegates and callback functions.
- Use timer `startOnce()` method rather than `start(false)`
- Use C++ iterators in preference to C-style loops `for(int i=0; i<list.count(); ++i) {...}`
- Ensure consistent use of `WIFI_SSID` and `WIFI_PASSWORD`
- Use `Serial` methods in preference to `debug_x` where intent is not actually for debugging
- Use anonymous namespaces and remove redundant static declarations
- Avoid nested `if` statements
- Place `init()` function at end of main application source file
- Reduce variable scope (declare at point of first use)
- static/global variables do not require explicit initialisation to 0


Sample-specific changes:

- Revise `HttpServer_AJAX` so that GPIO numbers are consistent with web code
- Update Basic_Ssl keys, requires Bearssl
- Update Basic_DateTime sample
  - Simplify code using LineBuffer
  - Accept either numeric timestamp or HTTP date string. Note: ISO8601 string conversion not currently supported by `DateTime`.
  - Don't emulate console via telnet, use default CLI
- Rewrite Basic_Neopixel sample
  - Enumerate color values
  - Reduce global variables and duplicated code
  - Verify logic flow using Host
- Rewrite Display_TM1637 as state machine (coroutine)
- Fix Basic_Storage, didn't actually use RAM as indicated
- Add Host `Print` stream support, update `Basic_Utility` sample


Other changes

- Update `jerryscript` library to latest. CI improvements and removes deprecation warnings.
- Fix bad memory casts in si4432 library. Also builds for other architectures than esp8266, so remove SOC restrictions.
- Fix unused variable warning in `CommandProcessing` library

Author: mikee47

Sming/Arch/Host/Components/hostlib/include/hostlib/Streams.h

@@ -0,0 +1,50 @@
+/**
+ * Streams.h - Print support for host output
+ *
+ * Copyright 2024 mikee47 <mike@sillyhouse.net>
+ *
+ * This file is part of the Sming Framework Project
+ *
+ * This library is free software: you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation, version 3 or later.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with SHEM.
+ * If not, see <https://www.gnu.org/licenses/>.
+ *
+ ****/
+
+#pragma once
+
+#include <unistd.h>
+
+namespace Host
+{
+class OutputStream : public Print
+{
+public:
+	OutputStream(int fileno) : fileno(fileno)
+	{
+	}
+
+	virtual size_t write(uint8_t c) override
+	{
+		return write(&c, 1);
+	}
+
+	size_t write(const uint8_t* buffer, size_t size) override
+	{
+		return ::write(fileno, buffer, size);
+	}
+
+private:
+	int fileno;
+};
+
+OutputStream standardOutput(STDOUT_FILENO);
+OutputStream standardError(STDERR_FILENO);
+
+}; // namespace Host

Sming/Components/Storage/src/include/Storage/SysMem.h

@@ -73,6 +73,8 @@ class SysMem : public Device
 	class SysMemPartitionTable : public PartitionTable
 	{
 	public:
+		using PartitionTable::add;
+
 		/**
 		 * @brief Add partition entry for FlashString data access
 		 */