Move pages back into a "pages" folder

pages/common/gifsicle.md

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+# gifsicle
+
+> Create gifs
+
+- Making a GIF animation with gifsicle
+
+`gifsicle --delay={{10}} --loop *.gif > {{anim.gif}}`
+
+- Extracting frames from an animation
+
+`gifsicle {{anim.gif}} '#0' > {{firstframe.gif}}`
+
+- You can also edit animations by replacing, deleting, or inserting frames
+
+`gifsicle -b {{anim.gif}} --replace '#0' {{new.gif}}`