copyq: add page (#3411)

pages/common/ copyq.md

@@ -0,0 +1,32 @@
+# copyq
+
+> Clipboard manager with advanced features.
+> More information: <https://hluk.github.io/CopyQ/>.
+
+- Launch CopyQ to store clipboard history:
+
+`copyq`
+
+- Show current clipboard content:
+
+`copyq clipboard`
+
+- Insert raw text into the clipboard history:
+
+`copyq add -- {{text1}} {{text2}} {{text3}}`
+
+- Insert text containing escape sequences ('\n', '\t') into the clipboard history:
+
+`copyq add {{firstline\nsecondline}}`
+
+- Print the content of the first 3 items in the clipboard history:
+
+`copyq read 0 1 2`
+
+- Copy a file's contents into the clipboard:
+
+`copyq copy < {{file.txt}}`
+
+- Copy a JPEG image into the clipboard:
+
+`copyq copy image/jpeg < {{image.jpg}}`