Add littlefs file system and update Sys.IO.FileSystem and stream

[josesimoes]

Description

• Add littlefs to build system.
• Replacing and removing Win.Storage from ChibiOS, Azure RTOS and ESP32 targets.
• Add native implementation for File Stream and other new methods.
• Add stream to handle interactions with all storage devices (SD Card, internal flash, USB MSD).

Motivation and Context

• Need to replace SPIFFs with an alternative library that is actively maintained, plus it has better performance.
• Following Add nativefilestream and several new methods to File and FileStream System.IO.FileSystem#98.
• Resolves F7 series FileIO caching issue Home#534.
• Resolves Helper Method to Re-Format Internal Flash Drives on Boards that Support It Home#1229.
• Resolves Need a way to mount SD Card reader on STM32 Home#808.
• Resolves Windows.Storage.Devices List Storage, Folder and File Size  Home#799.

How Has This Been Tested?

• Unit tests in Sys.IO.File repo.

Screenshots

Types of changes

• Improvement (non-breaking change that improves a feature, code or algorithm)
• Bug fix (non-breaking change which fixes an issue with code or algorithm)
• New feature (non-breaking change which adds functionality to code)
• Breaking change (fix or feature that would cause existing functionality to change)
• Config and build (change in the configuration and build system, has no impact on code or features)
• Dev Containers (changes related with Dev Containers, has no impact on code or features)
• Dependencies (update dependencies and changes associated, has no impact on code or features)
• Documentation (changes or updates in the documentation, has no impact on code or features)

Checklist

• My code follows the code style of this project (only if there are changes in source code).
• My changes require an update to the documentation (there are changes that require the docs website to be updated).
• I have updated the documentation accordingly (the changes require an update on the docs in this repo).
• I have read the CONTRIBUTING document.
• I have tested everything locally and all new and existing tests passed (only if there are changes in source code).

[Ellerbach]

Very nice heavy lifting! Few comments

[Ellerbach]

A lot of work and efforts in the PR and I know a lot of tests. So approving it.

[networkfusion]

Current issue seems to be:

and/or undefined ref to lfsFileSystemReady

[networkfusion]

For ESP32:

[josesimoes]

@MateuszKlatecki following this, NXP is the last target using Win.Storage.
Any change you guys can put some work on this and migrate to the new FileSystem namespace and implementation so we can get rid of Win-Storage for good? Thanks!