📝 Add linux launcher details to README (#264)

* adding alternative launchers

Adding ulauncher, walker, and dmenu based alternatives

* Update README.md

replace ### with ## h1

Author: jacostag

README.md

@@ -72,6 +72,8 @@ See the [nix package directory](https://search.nixos.org/packages?channel=unstab
 
 **Note:** Do you want this on another package manager? [Create an issue](https://github.com/joshmedeski/sesh/issues/new) and let me know!
 
+## Extensions
+
 ## Raycast Extension
 
 The [sesh companion extension](https://www.raycast.com/joshmedeski/sesh) for [Raycast](https://www.raycast.com/) makes it easy to use sesh outside of the terminal.
@@ -83,7 +85,44 @@ Here are limitations to keep in mind:
 
 <a title="Install sesh Raycast Extension" href="https://www.raycast.com/joshmedeski/sesh"><img src="https://www.raycast.com/joshmedeski/sesh/[email protected]?v=1.1" height="64" alt="" style="height: 64px;"></a>
 
-## How to use
+## Ulauncher Extension
+
+For Linux users using [Ulauncher](https://ulauncher.io/) there is an [extension](https://ext.ulauncher.io/-/github-jacostag-sesh-ulauncher) to use sesh outside the terminal.
+
+
+Here are limitations to keep in mind:
+
+- tmux has to be running before you can use the extension
+
+
+## Walker launcher usage (Linux)
+
+Create an action directly on $XDG_CONFIG_HOME/config.toml
+
+
+```
+[[plugins]]
+name = "sesh"
+prefix = ";s "
+src_once = "sesh list -d -c -t -T"
+cmd = "sesh connect --switch %RESULT%"
+keep_sort = false
+recalculate_score = true
+show_icon_when_single = true
+switcher_only = true
+```
+
+### For the dmenu mode you can use:
+
+#### Fish shell:
+set ssession $(sesh l -t -T -d -H | walker -d -f -k -p "Sesh sessions"); sesh cn --switch $ssession
+
+#### Bash/Zsh:
+ssession=$(sesh l -t -T -d -H | walker -d -f -k -p "Sesh sessions"); sesh cn --switch $ssession
+
+##### For dmenu launchers replace walker -dfk with dmenu or rofi)
+
+### How to use
 
 ### tmux for sessions