[guides] Add a new ClipboardGuide describing cut/copy/paste (#2530)

Co-authored-by: anjakefala <[email protected]>

visidata/guides/ClipboardGuide.md

@@ -0,0 +1,48 @@
+# Copy, Cut and Paste...
+
+## ...rows to/from the internal clipboard
+
+- {help.commands.copy_row}
+- {help.commands.copy_selected}
+
+- {help.commands.cut_row}
+- {help.commands.cut_selected}
+
+- {help.commands.paste_after}
+- {help.commands.paste_before}
+
+## ...cells to/from the internal clipboard
+
+- {help.commands.copy_cell}
+- {help.commands.cut_cell}
+- {help.commands.paste_cell}
+
+## ...columns from the intenral clipboard
+
+- {help.commands.copy_cells}
+- {help.commands.cut_cells}
+- {help.commands.setcol_clipboard}
+
+If there are fewer values in the clipboard than in the selected target column, the clipboard values will be repeated in sequence.
+
+## ....to/from the system clipboard
+
+- {help.commands.syscopy_cell}
+- {help.commands.syscopy_cells}
+
+- {help.commands.syscopy_row}
+- {help.commands.syscopy_selected}
+
+- {help.commands.syspaste_cells}
+- {help.commands.syspaste_cells_selected}
+
+## Paste a new sheet from the system clipboard
+
+- {help.commands.open_syspaste}
+
+The paste command will prompt for the filetype, so the input data (from the clipboard) can be in any supported format.
+
+## Relevant options
+
+- {help.options.clipboard_copy_cmd}
+- {help.options.clipboard_paste_cmd}