cava: add page (#17235)

pages/common/cava.md

@@ -0,0 +1,36 @@
+# cava
+
+> Cross-platform audio visualizer.
+> More information: <https://github.com/karlstav/cava#usage>.
+
+- Start the visualizer:
+
+`cava`
+
+- Use the specified configuration file:
+
+`cava -p {{path/to/file}}`
+
+- Increase/Decrease sensitivity:
+
+`{{<ArrowUp>|<ArrowDown>}}`
+
+- Increase/Decrease the number of bars:
+
+`{{<ArrowRight>|<ArrowLeft>}}`
+
+- Reload the configuration file (this resets the number of bars and sensitivity):
+
+`<r>`
+
+- Reload colors from the configuration file:
+
+`<c>`
+
+- Cycle the foreground/background color:
+
+`{{<f>|<b>}}`
+
+- Quit:
+
+`<q>`