v1.0.0 for ESP8266 + LwIP W5100 / W5100S

#### Releases v1.0.0

1. Initial coding to port [ESPAsync_WiFiManager](https://github.com/khoih-prog/ESPAsync_WiFiManager) to ESP8266 boards using `LwIP W5100 / W5100S Ethernet`.
2. Use `allman astyle`

.codespellrc

@@ -0,0 +1,7 @@
+# See: https://github.com/codespell-project/codespell#using-a-config-file
+[codespell]
+# In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
+ignore-words-list = ,
+check-filenames =
+check-hidden =
+skip = ./.git,./src,./examples,./Packages_Patches,./LibraryPatches

CONTRIBUTING.md

@@ -0,0 +1,79 @@
+## Contributing to AsyncESP8266_W5100_Manager
+
+### Reporting Bugs
+
+Please report bugs in AsyncESP8266_W5100_Manager if you find them.
+
+However, before reporting a bug please check through the following:
+
+* [Existing Open Issues](https://github.com/khoih-prog/AsyncESP8266_W5100_Manager/issues) - someone might have already encountered this.
+
+If you don't find anything, please [open a new issue](https://github.com/khoih-prog/AsyncESP8266_W5100_Manager/issues/new).
+
+### How to submit a bug report
+
+Please ensure to specify the following:
+
+* Arduino IDE version (e.g. 1.8.19) or Platform.io version
+* Board Core Version (e.g. ESP8266 core v3.0.2)
+* Contextual information (e.g. what you were trying to achieve)
+* Simplest possible steps to reproduce
+* Anything that might be relevant in your opinion, such as:
+  * Operating system (Windows, Ubuntu, etc.) and the output of `uname -a`
+  * Network configuration
+
+
+Please be educated, civilized and constructive. Disrespective posts against [GitHub Code of Conduct](https://docs.github.com/en/site-policy/github-terms/github-event-code-of-conduct) will be ignored and deleted.
+
+
+### Example
+
+```
+Arduino IDE version: 1.8.19
+ESP8266 Core Version v3.0.2
+ESP8266_NODEMCU
+OS: Ubuntu 20.04 LTS
+Linux xy-Inspiron-3593 5.15.0-56-generic #62~20.04.1-Ubuntu SMP Tue Nov 22 21:24:20 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
+
+Context:
+I encountered a crash while using this library
+Steps to reproduce:
+1. ...
+2. ...
+3. ...
+4. ...
+```
+
+### Additional context
+
+Add any other context about the problem here.
+
+---
+
+### Sending Feature Requests
+
+Feel free to post feature requests. It's helpful if you can explain exactly why the feature would be useful.
+
+There are usually some outstanding feature requests in the [existing issues list](https://github.com/khoih-prog/AsyncESP8266_W5100_Manager/issues?q=is%3Aopen+is%3Aissue+label%3Aenhancement), feel free to add comments to them.
+
+---
+
+### Sending Pull Requests
+
+Pull Requests with changes and fixes are also welcome!
+
+Please use the `astyle` to reformat the updated library code as follows (demo for Ubuntu Linux)
+
+1. Change directory to the library GitHub
+
+```
+xy@xy-Inspiron-3593:~$ cd Arduino/xy/AsyncESP8266_W5100_Manager_GitHub/
+xy@xy-Inspiron-3593:~/Arduino/xy/AsyncESP8266_W5100_Manager_GitHub$
+```
+
+2. Issue astyle command
+
+```
+xy@xy-Inspiron-3593:~/Arduino/xy/AsyncESP8266_W5100_Manager_GitHub$ bash utils/restyle.sh
+```
+

changelog.md

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+# AsyncESP8266_W5100_Manager Library
+
+[![arduino-library-badge](https://www.ardu-badge.com/badge/AsyncESP8266_W5100_Manager.svg?)](https://www.ardu-badge.com/AsyncESP8266_W5100_Manager)
+[![GitHub release](https://img.shields.io/github/release/khoih-prog/AsyncESP8266_W5100_Manager.svg)](https://github.com/khoih-prog/AsyncESP8266_W5100_Manager/releases)
+[![GitHub](https://img.shields.io/github/license/mashape/apistatus.svg)](https://github.com/khoih-prog/AsyncESP8266_W5100_Manager/blob/main/LICENSE)
+[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
+[![GitHub issues](https://img.shields.io/github/issues/khoih-prog/AsyncESP8266_W5100_Manager.svg)](http://github.com/khoih-prog/AsyncESP8266_W5100_Manager/issues)
+
+<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Donate to my libraries using BuyMeACoffee" style="height: 50px !important;width: 181px !important;" ></a>
+<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://img.shields.io/badge/buy%20me%20a%20coffee-donate-orange.svg?logo=buy-me-a-coffee&logoColor=FFDD00" style="height: 20px !important;width: 200px !important;" ></a>
+
+
+---
+---
+
+## Table of contents
+
+* [Changelog](#changelog)
+  * [Releases v1.0.0](#releases-v100)
+
+
+
+---
+---
+
+## Changelog
+
+#### Releases v1.0.0
+
+1. Initial coding to port [ESPAsync_WiFiManager](https://github.com/khoih-prog/ESPAsync_WiFiManager) to ESP8266 boards using `LwIP W5100 / W5100S Ethernet`.
+2. Use `allman astyle`
+
+