doc: Update README installation instructions (#57)

* doc: Update README installation instructions

Remove the temporary instructions of installing the package locally now that the SDK is available as a PyPI package.

* doc: Remove redundant line in README.

Author: anubhav756

README.md

@@ -8,8 +8,8 @@ applications, enabling advanced orchestration and interaction with GenAI models.
 ## Table of Contents
 <!-- TOC -->
 
-- [Quickstart](#quickstart)
 - [Installation](#installation)
+- [Quickstart](#quickstart)
 - [Usage](#usage)
 - [Loading Tools](#loading-tools)
     - [Load a toolset](#load-a-toolset)
@@ -34,6 +34,12 @@ applications, enabling advanced orchestration and interaction with GenAI models.
 
 <!-- /TOC -->
 
+## Installation
+
+```bash
+pip install toolbox-langchain
+```
+
 ## Quickstart
 
 Here's a minimal example to get you started using
@@ -60,18 +66,6 @@ for s in agent.stream({"messages": [("user", prompt)]}, stream_mode="values"):
         message.pretty_print()
 ```
 
-## Installation
-
-> [!IMPORTANT]
-> This SDK is not yet available on PyPI. For now, install it from source by
-> following these [installation instructions](DEVELOPER.md).
-
-You can install the Toolbox SDK for LangChain using `pip`.
-
-```bash
-pip install toolbox-langchain
-```
-
 ## Usage
 
 Import and initialize the toolbox client.
@@ -344,4 +338,4 @@ async def main():
 
 if __name__ == "__main__":
     asyncio.run(main())
-```
+```