Added partial SFTP support for file transfer over SSH

1. Added partial SFTP support for file transfer over SSH
2. Fixes minor bugs

Updated framwork to support more server specific features

1. Updated base impl in interface for HTTP server and Files system interface
2. Added storage menu in web portal
3. Updated SSH, HTTP, Telnet servers with necessary fixes.
4. Minor fixes

Portable Device Interface (PDI) framework initial release

1. Introduced portable device interface framework base.
2. Added required interface to import on any device.
3. Currently added interfaces for arduinouno, esp8266, esp32 devices.
4. Redesigned service structures based on interface middlewares.
5. This will be the initial release for portable device interface framework with basic readme and incomplete documentations. coming releases will cover the document and ongoing development for adding support for multiple devices.

GPIO Blink mode

1. Updated for arduino-esp8266 3.0.2 release
2. Added GPIO Blink mode so we can blink any gpio with required duration from portal

Code cleanup activity

1. This release is part of code cleanup activity
2. Added interfaces as well to use for wifi, client, server, http client
3. Added device iot beta version

Feature updates

• added GPIO monitor/control with mqtt
• added GPIO all pin monitor under gpio monitor section in web portal
• replaced logout button to home button in all web portal item detail form pages
• updated NTP update delay
• added n/w time to dashboard in web portal
• updated html helper functions to support table elements
• some minor bug fixes

mqtt example, auto factory reset and some improvements

• Added mqtt example
• bidirectional default gpio json payload to control gpio operations
• mqtt service provider with new member for set callbacks
• database config validity check for auto factory reset

new examples with structure improvements

• Added controller, database table and task scheduling examples for reference
• improved database and controller manager structure
• clear task scheduler runtime task remove bug
• allowed station password to be empty to connect open networks

napt auto select on lwip variant

updated napt feature select based on lwip variant selection from arduino tool options

Initial release

This is initial release of esp8266 framework.