Add doc with links to all related repos (#259)

* Add doc with links to all related repos

* Update SqlBindingRelatedRepos.md

* Update SqlBindingRelatedRepos.md

Author: lucyzhang929

docs/SqlBindingRelatedRepos.md

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+# Azure SQL Bindings for Azure Functions 
+This document contains a list of all repositories related to SQL Bindings.
+ 
+## Docs 
+[Azure SQL bindings for Functions | Microsoft Docs ](https://aka.ms/sqlbindings)
+  
+## SQL Bindings VSCode Extension 
+This extension enables users to develop Azure Functions with SQL Bindings.
+
+[azuredatastudio/extensions/sql-bindings at main · microsoft/azuredatastudio (github.com)](https://github.com/microsoft/azuredatastudio/tree/main/extensions/sql-bindings)
+
+STS contains the logic for adding a SQL binding to an existing Azure Function.
+
+[sqltoolsservice/src/Microsoft.SqlTools.ServiceLayer/AzureFunctions at main · microsoft/sqltoolsservice (github.com)](https://github.com/microsoft/sqltoolsservice/tree/main/src/Microsoft.SqlTools.ServiceLayer/AzureFunctions)
+ 
+## Templates 
+Contains templates for the various types of bindings and supported languages, each under a Sql* folder.
+
+[azure-functions-templates/Functions.Templates/Templates at dev · Azure/azure-functions-templates (github.com)](https://github.com/Azure/azure-functions-templates/tree/dev/Functions.Templates/Templates)
+ 
+### Instructions for adding new templates: 
+[Azure/azure-functions-templates: Azure functions templates for the azure portal, CLI, and VS (github.com)](https://github.com/Azure/azure-functions-templates#creating-a-dotnet-templates-cs-and-fs)
+ 
+## Extension Bundle 
+Currently SQL Bindings is part of the 3.x and 4.x Preview bundles. 
+
+[Azure/azure-functions-extension-bundles at v3.x-preview (github.com)](https://github.com/Azure/azure-functions-extension-bundles/tree/v3.x-preview)
+
+[Azure/azure-functions-extension-bundles at v4.x-preview (github.com)](https://github.com/Azure/azure-functions-extension-bundles/tree/v4.x-preview)
+ 
+## Python SQL Bindings 
+### Python Library 
+We define SqlRow and SqlRowList in _sql.py and the SqlConverter in sql.py. 
+
+[Azure/azure-functions-python-library: Azure Functions Python SDK (github.com)](https://github.com/Azure/azure-functions-python-library)
+ 
+### Python Worker  
+End to end tests for SQL Bindings in the Python Worker.
+
+[Azure/azure-functions-python-worker: Python worker for Azure Functions. (github.com)](https://github.com/Azure/azure-functions-python-worker)
+