docs: add Snippet Expander to Showcase (#3079)

* docs: add Snippet Expander to Showcase

* Remove package-lock.json

website/docs/community/showcase/snippetexpander.mdx

@@ -0,0 +1,27 @@
+# Snippet Expander
+
+```mdx-code-block
+<p style={{ "text-align": "center" }}>
+  <img src={require("@site/static/img/showcase/snippetexpandergui-select-snippet.png").default} />
+  <br />
+  Screenshot of Snippet Expander's Select Snippet window
+</p>
+<p style={{ "text-align": "center" }}>
+  <img src={require("@site/static/img/showcase/snippetexpandergui-add-snippet.png").default} />
+  <br />
+  Screenshot of Snippet Expander's Add Snippet screen
+</p>
+<p style={{ "text-align": "center" }}>
+  <img src={require("@site/static/img/showcase/snippetexpandergui-search-and-paste.png").default} />
+  <br />
+  Screenshot of Snippet Expander's Search & Paste window
+</p>
+```
+
+[Snippet Expander](https://snippetexpander.org) is "Your little expandable text snippets helper", for Linux.
+
+Snippet Expander comprises of a GUI application built with Wails for managing snippets and settings, with a Search & Paste window mode for quickly selecting and pasting a snippet.
+
+The Wails based GUI, go-lang CLI and vala-lang auto expander daemon all communicate with a go-lang daemon via D-Bus. The daemon does the majority of the work, managing the database of snippets and common settings, and providing services for expanding and pasting snippets etc.
+
+Check out the [source code](https://git.sr.ht/~ianmjones/snippetexpander/tree/trunk/item/cmd/snippetexpandergui/app.go#L38) to see how the Wails app sends messages from the UI to the backend that are then sent to the daemon, and subscribes to a D-Bus event to monitor changes to snippets via another instance of the app or CLI and show them instantly in the UI via a Wails event.