sc-im:add page (#2326)

pages/common/sc-im.md

@@ -0,0 +1,28 @@
+# SC-IM
+
+> A curses based, vim-like spreadsheet calculator.
+> Use hjkl or arrow keys to navigate.
+
+- Start SC-IM:
+
+`scim {{file_name}}.csv`
+
+- Enter a string into the current cell:
+
+`< or >`
+
+- Enter a numeric constant into the current cell:
+
+`=`
+
+- Edit string in the current cell:
+
+`E`
+
+- Edit number in the current cell:
+
+`e`
+
+- Center align the current cell:
+
+`|`