ref: Cleanup and rearrange files, update documentation

- Remove Ruby files since they aren't supported anymore
- Remove test and samples files
- Move all the "stable" plugins to `src` folder to follow standard conventions
- Update links and descriptions in the documentation

src/platform-info.py

@@ -0,0 +1,27 @@
+"""
+Shows platform details in the console
+
+Theme items in ~/.local/share/profanity/plugin_themes
+
+[platform]
+line=cyan
+"""
+
+import prof
+import platform
+
+
+def _cmd_platform():
+    result_summary = platform.platform()
+    prof.cons_show_themed("platform", "line", None, result_summary)
+
+
+def prof_init(version, status, account_name, fulljid):
+    synopsis = [ 
+        "/platform"
+    ]
+    description = "Output system information to the console window."
+    args = []
+    examples = []
+
+    prof.register_command("/platform", 0, 0, synopsis, description, args, examples, _cmd_platform)