Added rnsh to bootstrap console and updated RNS package to 0.5.0

Console/source/s_rnsh.md

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+[title]: <> (Shell Over Reticulum)
+## Shell Over Reticulum
+
+The `rnsh` program lets you establish fully interactive remote shell sessions over Reticulum. It also allows you to pipe any program to or from a remote system, and is similar to how the ``ssh`` program works.
+
+### Local Installation
+
+If you do not have access to the Internet, or would prefer to install `rnsh` directly from this RNode, you can use the following instructions.
+
+- If you do not have an Internet connection while installing make sure to install the [Reticulum](./s_rns.html) package first
+- Download the [{PKG_BASE_rnsh}]({ASSET_PATH}{PKG_rnsh}) package from this RNode and unzip it
+- Install it with the command `pip install ./{PKG_NAME_rnsh}`
+- Verify the installed `rnsh` version by running `rnsh --version`
+
+### Online Installation
+
+If you are connected to the Internet, you can try to install the latest version of `rnsh` via the `pip` package manager.
+
+- Install `rnsh` by running the command `pip install rnsh`
+- Verify the installed `rnsh` version by running `rnsh --version`