eww: add page (#14829)

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/linux/eww.md

@@ -0,0 +1,28 @@
+# eww
+
+> Implement your own custom widgets in any window manager.
+> More information: <https://elkowar.github.io/eww>.
+
+- Start the daemon:
+
+`eww daemon`
+
+- Open a widget:
+
+`eww -c {{path/to/source_code_directory}} open {{window_name}}`
+
+- Close a widget:
+
+`eww -c {{path/to/source_code_directory}} close {{window_name}}`
+
+- Reload the configuration:
+
+`eww reload`
+
+- Kill the daemon:
+
+`eww kill`
+
+- Print and watch logs:
+
+`eww logs`