Add WebNN implementation status contribution mechanics (#67)

* Add WebNN implementation status contribution mechanics

Author: ibelem

CONTRIBUTING.md

@@ -0,0 +1,72 @@
+# Contributing to Web Machine Learning website
+
+First of all, thank you very much for your interest in contributing to Web Machine Learning website! We're really happy to accept contributions from everyone, whether you're a browser engineer, a spec writer or a web developer.
+
+## WebNN Implementation Status
+
+This repository contains raw data from the [WebNN Implementation Status](https://webmachinelearning.github.io/webnn-status/) tables. If you are interested in updating or adding to the WebNN Implementation Status data on the site, please edit the [webnn_status.json](./assets/json/webnn_status.json) file.
+
+The WebNN API [browser compat data (BCD)](https://github.com/search?q=repo%3Amdn%2Fbrowser-compat-data+webnn&type=code) is the upstream and we will keep it up to date as a first priority. The [webnn_status.json](./assets/json/webnn_status.json) adds the following domain-specific data on top of the [WebNN API BCD](https://github.com/search?q=repo%3Amdn%2Fbrowser-compat-data+webnn&type=code) baseline data:
+
+- WebNN ops mapping to native backends
+- WebNN WPT test and test result links
+- WebNN JavaScript ML Frameworks integration status
+
+### WebNN Implementation Status Data
+
+The [webnn_status.json](./assets/json/webnn_status.json) is the data source for the [WebNN Implementation Status](https://webmachinelearning.github.io/webnn-status/) page. By contributing updates to this file on GitHub you can help keep the implementation status page up to date. An example entry for the [`argMax`](https://www.w3.org/TR/webnn/#dom-mlgraphbuilder-argmax) op looks like the following:
+
+```
+    {
+      "op": "argMax",
+      "op_id": "argminmax",
+      "version": "",
+      "wpt": "arg_min_max",
+      "wpt_progress": 4,
+      "xnnpack_op": [
+        ""
+      ],
+      "xnnpack_progress": 2,
+      "xnnpack_chromium_version_added": "",
+      "dml_op": [
+        "REDUCE_FUNCTION_ARGMAX"
+      ],
+      "dml_progress": 4,
+      "dml_chromium_version_added": "M122",
+      "mlservice_op": [
+        ""
+      ],
+      "mlservice_progress": 2,
+      "mlservice_chromium_version_added": "",
+      "tflite_op": [
+        ""
+      ],
+      "tflite_progress": 2,
+      "tflite_version_added": "",
+      "ort_op": [
+        "ArgMax"
+      ],
+      "ort_progress": 4,
+      "ort_version_added": "main",
+      "notes": ""
+    }
+```    
+
+### Supported Changes
+
+Currently the following feature information can be modified for WebNN XNNPACK, DirectML and MLService backends:
+
+* **op** - Operation name defined in [Web Neural Network API](https://www.w3.org/TR/webnn/) spec
+* **op_id** - Operation name defined in anchor link in the spec
+* **wpt** - The WebNN test cases id used in [Web Platform Tests](https://github.com/web-platform-tests/wpt/tree/master/webnn) and [WPT dashboard](https://wpt.fyi/)
+* **[*]_op** - The operation list of native ML libraries or the JavaScript ML frameworks that map to WebNN API
+* **[*]_version_added** - The Chromium or the JavaScript ML framework version where support for the feature was added
+* **[*]_progress**
+    * **1** - Not Implemented / Not Supported
+    * **2** - Work in Progress
+    * **3** - Partial Implementation
+    * **4** - Implemented / Supported
+
+## License
+
+The data in this repository is available for use under the [W3C Software and Document license](https://www.w3.org/Consortium/Legal/copyright-software).

README.md

@@ -1,4 +1,6 @@
-# Web Machine Learning
+<p align="center"><img width="30%" src="./logos/webml/logo-webml-white.png" /></p>
+
+W3C Web Machine Learning Working Group and Community Group website.
 
 ## Environment Setup
 
@@ -7,8 +9,17 @@ gem install bundler jekyll
 ```
 
 ## Run
+
 ```
 bundle install
 bundle exec jekyll serve
 Server address: http://127.0.0.1:4000/
 ```
+
+## Contributing
+
+We welcome contributions! Please see the [contributing guidelines](CONTRIBUTING.md).
+
+## License
+
+All documents in this repository are licensed by contributors under the [W3C Software and Document license](https://www.w3.org/Consortium/Legal/copyright-software).