move readme and license (#37)

Author: zhiyuanliang-ms

sdk/feature-management/LICENSE

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+    MIT License
+
+    Copyright (c) Microsoft Corporation.
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE

sdk/feature-management/README.md

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+# Microsoft Feature Management for JavaScript
+
+[![feature-management](https://img.shields.io/npm/v/@microsoft/feature-management?label=@microsoft/feature-management)](https://www.npmjs.com/package/@microsoft/feature-management)
+
+Feature Management is a library for enabling/disabling features at runtime.
+Developers can use feature flags in simple use cases like conditional statement to more advanced scenarios like conditionally adding routes.
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js LTS version
+
+### Usage
+
+You can use feature flags from the Azure App Configuration service, local files or any other sources.
+
+#### Use feature flags from Azure App Configuration
+
+The App Configuration JavaScript provider provides feature flags in as a `Map` object.
+A builtin `ConfigurationMapFeatureFlagProvider` helps to load feature flags in this case.
+
+```js
+const appConfig = load(connectionString, {featureFlagOptions}); // load feature flags from Azure App Configuration service
+const featureProvider = new ConfigurationMapFeatureFlagProvider(appConfig);
+const featureManager = new FeatureManager(featureProvider);
+const isAlphaEnabled = await featureManager.isEnabled("Alpha");
+console.log("Feature Alpha is:", isAlphaEnabled);
+```
+
+#### Use feature flags from a json file
+
+A sample JSON file with the following format can be used to load feature flags.
+The JSON file can be read and parsed as an object as a whole.
+A builtin `ConfigurationObjectFeatureFlagProvider` helps to load feature flags in this case.
+
+Content of `sample.json`:
+```json
+{
+    "feature_management": {
+        "feature_flags": [
+            {
+                "id": "Alpha",
+                "description": "",
+                "enabled": "true",
+                "conditions": {
+                    "client_filters": []
+                }
+            }
+        ]
+    }
+}
+```
+
+Load feature flags from `sample.json` file.
+```js
+const config = JSON.parse(await fs.readFile("path/to/sample.json"));
+const featureProvider = new ConfigurationObjectFeatureFlagProvider(config);
+const featureManager = new FeatureManager(featureProvider);
+const isAlphaEnabled = await featureManager.isEnabled("Alpha");
+console.log("Feature Alpha is:", isAlphaEnabled);
+```
+
+## Contributing
+
+This project welcomes contributions and suggestions.  Most contributions require you to agree to a
+Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
+the rights to use your contribution. For details, visit https://cla.opensource.microsoft.com.
+
+When you submit a pull request, a CLA bot will automatically determine whether you need to provide
+a CLA and decorate the PR appropriately (e.g., status check, comment). Simply follow the instructions
+provided by the bot. You will only need to do this once across all repos using our CLA.
+
+This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
+For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
+contact [[email protected]](mailto:[email protected]) with any additional questions or comments.
+
+## Trademarks
+
+This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft 
+trademarks or logos is subject to and must follow 
+[Microsoft's Trademark & Brand Guidelines](https://www.microsoft.com/en-us/legal/intellectualproperty/trademarks/usage/general).
+Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship.
+Any use of third-party trademarks or logos are subject to those third-party's policies.