Create install.md

Author: MattEqualsCoder

docs/install.md

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+# Installation Instructions
+
+## Basic Installation
+
+### Windows
+
+1. Download the MSUScripterSetupWin file from the [latest release](https://github.com/MattEqualsCoder/MSUScripter/releases)
+2. Run the executable to install
+3. Install all dependencies in the dependency installer window
+
+### Linux
+
+1. Install [.NET 9.0](https://learn.microsoft.com/en-us/dotnet/core/install/linux)
+   - Make sure that dotnet is in the PATH
+   - If you need multiple versions of .NET installed, you may want to use te [scripted install](https://learn.microsoft.com/en-us/dotnet/core/install/linux-scripted-manual#scripted-install) 
+2. Download the MSUScripterLinux tar file from the [latest release](https://github.com/MattEqualsCoder/MSUScripter/releases)
+3. Make the MSUScripter file executable to run or run the command `dotnet MSUScripter.dll`
+4. Install all dependencies in the dependency installer window
+
+## Manual Dependency Installation
+
+With the exception of msupcm++, you can install the dependencies manually. This can be useful to preserve space if you are going to use FFmpeg or Python for other things.
+
+### FFmpeg
+
+FFmpeg is used by the Python Companion App to create YouTube videos for testing for copyright strikes.
+
+1. Download [FFmpeg](https://www.ffmpeg.org/download.html)
+2. Make sure FFmpeg is available in your PATH
+3. To verify you should be able to open up a new terminal/command prompt window and simply type in `ffmpeg -version` to get a response
+
+### Python Companion App
+
+1. Download and install [Python](https://www.python.org/downloads/) (not needed on Linux)
+2. Download and install [pipx](https://pipx.pypa.io/stable/installation/)
+   - Make sure to run `pipx ensurepath`
+3. Run the command `pipx install py-msu-scripter-app`
+   - If preferred, you can also install pip and install via `python -m pip install py-msu-scripter-app` or `pip install py-msu-scripter-app` based on your environment