add example configuration files for windows

Related #431

etc/lfrc.cmd.example

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+# interpreter for shell commands
+set shell cmd
+
+# Shell commands with multiline definitions and/or positional arguments and/or
+# quotes do not work in Windows. For anything but the simplest shell commands,
+# it is recommended to create separate script files and simply call them here
+# in commands or mappings.
+
+# change the editor used in default editor keybinding
+# There is no builtin terminal editor installed in Windows. The default editor
+# mapping uses 'notepad' which launches in a separate GUI window. You may
+# instead install a terminal editor of your choice and replace the default
+# editor keybinding accordingly.
+map e $vim %f%
+
+# change the pager used in default pager keybinding
+# The standard pager used in Windows is 'more' which is not a very capable
+# pager. You may instead install a pager of your choice and replace the default
+# pager keybinding accordingly.
+map i $less %f%
+
+# change the shell used in default shell keybinding
+map w $powershell
+
+# change 'doc' command to use a different pager
+cmd doc $lf -doc | less
+
+# leave some space at the top and the bottom of the screen
+set scrolloff 10
+
+# use enter for shell commands
+map <enter> shell

etc/lfrc.ps1.example

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+# interpreter for shell commands
+set shell powershell
+
+# Shell commands with multiline definitions and/or positional arguments and/or
+# quotes do not work in Windows. For anything but the simplest shell commands,
+# it is recommended to create separate script files and simply call them here
+# in commands or mappings.
+#
+# Also, the default keybindings are defined using cmd syntax (i.e. '%EDITOR%')
+# which does not work with powershell. Therefore, you need to override these
+# keybindings with explicit choices accordingly.
+
+# change the editor used in default editor keybinding
+# There is no builtin terminal editor installed in Windows. The default editor
+# mapping uses 'notepad' which launches in a separate GUI window. You may
+# instead install a terminal editor of your choice and replace the default
+# editor keybinding accordingly.
+map e $vim $Env:f
+
+# change the pager used in default pager keybinding
+# The standard pager used in Windows is 'more' which is not a very capable
+# pager. You may instead install a pager of your choice and replace the default
+# pager keybinding accordingly.
+map i $less $Env:f
+
+# change the shell used in default shell keybinding
+map w $powershell
+
+# change 'doc' command to use a different pager
+cmd doc $lf -doc | less
+
+# leave some space at the top and the bottom of the screen
+set scrolloff 10
+
+# use enter for shell commands
+map <enter> shell