Move pages back into a "pages" folder

pages/common/less.md

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+# less
+
+> Opens a file for reading
+> Allows movement and search
+> Doesn't read the entire file (suitable for logs)
+
+- open a file
+
+`less {{source_file}}`
+
+- page up / down
+
+`d (next), D (previous)`
+
+- go to start / end of file
+
+`g (start), G (end)`
+
+- search for a string
+
+`/{{something}}   then   n (next), N (previous)`
+
+- exit
+
+`q`