examples: add a cpu_features/ folder, with several examples, using SSE and MMX assembly instructions (#22645)

examples/cpu_features/SSE_and_MMX_Extensions/README.md

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+Note: To more deep study see https://en.wikibooks.org/wiki/X86_Assembly
+
+# SSE and MMX Extensions
+
+This document provides an overview of the SSE and MMX extensions used in the project.
+
+## Table of Contents
+
+- [Introduction](#introduction)
+- [SSE Extensions](#sse-extensions)
+- [MMX Extensions](#mmx-extensions)
+- [Usage](#usage)
+
+## Introduction
+
+SSE (Streaming SIMD Extensions) and MMX (MultiMedia eXtensions) are instruction sets used to
+enhance the performance of multimedia and signal processing applications.
+
+## SSE Extensions
+
+SSE extensions provide a set of instructions that can handle multiple data with a single
+instruction, improving the performance of applications that require heavy mathematical
+computations.
+
+from: [wikibooks](https://en.wikibooks.org/wiki/X86_Assembly/SSE#SSE_Instruction_Set)
+There are literally hundreds of SSE instructions, some of which are capable of much more than
+simple SIMD arithmetic. For more in-depth references take a look at the resources chapter of this
+book.
+
+You may notice that many floating point SSE instructions end with something like PS or SD. These
+suffixes differentiate between different versions of the operation. The first letter describes
+whether the instruction should be Packed or Scalar. Packed operations are applied to every member
+of the register, while scalar operations are applied to only the first value. For example, in
+pseudo-code, a packed add would be executed as:
+
+```
+v1[0] = v1[0] + v2[0]
+v1[1] = v1[1] + v2[1]
+v1[2] = v1[2] + v2[2]
+v1[3] = v1[3] + v2[3]
+```
+
+While a scalar add would only be:
+
+```
+v1[0] = v1[0] + v2[0]
+```
+
+The second letter refers to the data size: either Single or Double. This simply tells the
+processor whether to use the register as four 32-bit floats or two 64-bit doubles, respectively.
+
+## MMX Extensions
+
+MMX extensions are designed to accelerate multimedia and communication applications by providing
+instructions that can process multiple data elements in parallel.
+
+## Usage
+
+To use these extensions in your project, ensure that your compiler supports them and that you have
+enabled the appropriate flags.
+On Linux, you can run the command `lscpu`
+
+Note: the examples here will compile, but not run on CPU architectures != amd64, like ARM or RISCV .