p5:add page (#1788)

pages/common/p5.md

@@ -0,0 +1,19 @@
+# p5
+
+> P5js template builder and sketch manager.
+
+- Create a new p5 collection:
+
+`p5 new {{collection_name}}`
+
+- Generate a new p5 project (should be run from collection directory):
+
+`p5 generate {{project_name}}`
+
+- Run the p5 manager server:
+
+`p5 server`
+
+- Update libraries to their latest versions:
+
+`p5 update`