modules: add mem module

doc/yambar-modules-mem.5.scd

@@ -0,0 +1,51 @@
+yambar-modules-mem(5)
+
+# NAME
+mem - This module provides the memory usage
+
+# TAGS
+
+[[ *Name*
+:[ *Type*
+:[ *Description*
+|  free
+:  int
+:  Free memory in bytes
+|  used
+:  int
+:  Used memory in bytes
+|  total
+:  int
+:  Total memory in bytes
+|  percent_free
+:  range
+:  Free memory in percent
+|  percent_used
+:  range
+:  Used memory in percent
+
+# CONFIGURATION
+
+[[ *Name*
+:[ *Type*
+:[ *Req*
+:[ *Description*
+|  interval
+:  string
+:  no
+:  Refresh interval of the memory usage stats in ms (default=500). Cannot be less then 500 ms
+
+# EXAMPLES
+
+```
+bar:
+  left:
+    - mem:
+        interval: 2500
+        content:
+          string: {text: "{used:mb}MB"}
+```
+
+# SEE ALSO
+
+*yambar-modules*(5), *yambar-particles*(5), *yambar-tags*(5), *yambar-decorations*(5)