pio-settings: add page (#5522)

pages/common/pio-settings.md

@@ -0,0 +1,20 @@
+# pio settings
+
+> View and modify PlatformIO settings.
+> More information: <https://docs.platformio.org/en/latest/core/userguide/cmd_settings.html>.
+
+- Display the names, values and descriptions of all PlatformIO settings:
+
+`pio settings get`
+
+- Display the name, value and description of a specific PlatformIO setting:
+
+`pio settings get {{setting}}`
+
+- Set a specific setting value:
+
+`pio settings set {{setting}} {{value}}`
+
+- Reset the values of all modifed settings to their factory defaults:
+
+`pio settings reset`