Disk: add --disk-show-unknown option

Ref: https://github.com/LinusDierheimer/fastfetch/issues/383#issuecomment-1376893128

src/data/config_user.txt

@@ -212,6 +212,31 @@
 # Default is auto.
 #--gl auto
 
+# Disk option
+# Sets if removable volume should be printed
+# Must be either true or false
+# Default is true.
+#--disk-show-removable true
+
+# Disk option
+# Sets if hidden volume should be printed
+# Must be either true or false
+# Default is false.
+#--disk-show-hidden false
+
+# Disk option
+# Sets if unknown (unable to detect sizes) volume should be printed
+# Must be either true or false
+# Default is false.
+#--disk-show-unknown false
+
+# Disk option
+# A colon (semicolon on Windows) separated list of folder paths for the disk output
+# This option override `--disk-show-*` options above
+# Must be a string
+# Default is "/:/home" ("C:\\;D:\\ ..." on Windows).
+#--disk-folders /:/home
+
 # Percentage output type option
 # Applies to all modules that prints percentage values. Currently memory, swap, disk, battery and CPU usage are supported.
 # Only works with default format ( without --module-format option ).

src/data/help.txt

@@ -106,6 +106,7 @@ Module specific options:
     --disk-folders <folders>:       A colon (semicolon on Windows) separated list of folder paths for the disk output. Default is "/:/home" ("C:\\;D:\\ ..." on Windows)
     --disk-show-removable <?value>: Set if removable volume should be printed. Default is true
     --disk-show-hidden <?value>:    Set if hidden volumes should be printed. Default is false
+    --disk-show-unknown <?value>:   Set if unknown (unable to detect sizes) volumes should be printed. Default is false
     --battery-dir <folder>:         The directory where the battery folders are. Standard: /sys/class/power_supply/
     --cpu-temp  <?value>:           Detect and display CPU temperature if supported. Default is false
     --gpu-temp  <?value>:           Detect and display GPU temperature if supported. Default is false