add doc files

docs/content/configuration/config-file/disk-io-graph copy.md

@@ -0,0 +1 @@
+# Disk Usage Graph Configuration

docs/content/usage/widgets/disk-usage-graph.md

@@ -0,0 +1,17 @@
+# Disk Usage Graph Widget
+
+## Key bindings
+
+Note that key bindings are generally case-sensitive.
+
+| Binding   | Action                                  |
+| --------- | --------------------------------------- |
+| ++plus++  | Zoom in on chart (decrease time range)  |
+| ++minus++ | Zoom out on chart (increase time range) |
+| ++equal++ | Reset zoom                              |
+
+## Mouse bindings
+
+| Binding      | Action                                                         |
+| ------------ | -------------------------------------------------------------- |
+| ++"Scroll"++ | Scrolling up or down zooms in or out of the graph respectively |

docs/mkdocs.yml

@@ -169,6 +169,7 @@ nav:
           - "Temperature Widget": usage/widgets/temperature-table.md
           - "Temperature Graph Widget": usage/widgets/temperature-graph.md
           - "Disk I/O Graph Widget": usage/widgets/disk-io-graph.md
+          - "Disk Usage Graph Widget": usage/widgets/disk-usage.md
           - "Battery Widget": usage/widgets/battery.md
       - "Auto-Complete": usage/autocomplete.md
   - "Configuration":
@@ -183,6 +184,7 @@ nav:
           - "Temperature Table Widget": configuration/config-file/temperature-table.md
           - "Temperature Graph Widget": configuration/config-file/temperature-graph.md
           - "Disk I/O Graph Widget": configuration/config-file/disk-io-graph.md
+          - "Disk Usage Graph Widget": configuration/config-file/disk-usage.md
           - "Flags": configuration/config-file/flags.md
           - "Layout": configuration/config-file/layout.md
           - "Styling": configuration/config-file/styling.md