docs: installation doc

added installation doc with steps to install mutliworld and apply patch

docs/source/sections/installation.rst

@@ -4,5 +4,44 @@
 **Installation**
 ================
 
+`multiworld` can be installed in a few different ways depending on your needs. Below are instructions for installing it via PyPI and directly from the source.
 
-
+Installing from PyPI
+--------------------
+The easiest way to get started with `multiworld` is by installing it from the Python Package Index (PyPI). This method ensures you get the latest stable release.
+
+To install, simply run:
+
+.. code-block:: bash
+
+    pip install multiworld
+
+This command will download and install the latest version of `multiworld` and all of its dependencies.
+
+Installing from Source
+----------------------
+If you prefer to work with the latest development version or want to contribute to the project, you can clone the repository and install it manually.
+
+First, clone the repository from GitHub:
+
+.. code-block:: bash
+
+    git clone https://github.com/cisco-open/pymultiworld.git
+
+Then, navigate to the cloned directory and install the package:
+
+.. code-block:: bash
+
+    cd pymultiworld
+    pip install .
+
+This method allows you to modify the source code or contribute back to the project.
+
+Run post installation script
+----------------------------
+
+After installation, run the `m8d-post-setup` script:
+
+.. code-block:: bash
+
+    m8d-post-setup