doc: Add chromebook-linux.conf to examples

examples/chromebook-linux.conf

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+# NOTE: to use this, rename this file to default.conf or `your-chomebook-keyboard-name`.conf and put in /etc/keyd/
+
+# This is an chromebook like configuration, this remaps function keys 1 through 10 to fall in line with the chromeos remapping
+# while still allowing for full access to standard linux functions that rely on those function keys, such as TTY access or
+# terminal programs
+
+# Using this on an chromebook that has been modified to run linux will make the function keys work as designed originally 
+# for the most part, F4 and F5 are mapped differently due to limitations of `keyd` and lack of functional support for their features
+# in most linux desktop environments
+
+# pressing meta+Fn will trigger that FN key
+# pressing ctrl+alt+Fn will trigger that key stroke
+
+[ids]
+*
+
+## Chromebook function keys
+[main]
+f1 = back
+f2 = forward
+f3 = refresh
+f4 = print
+f5 = A-tab 
+f6 = brightnessdown
+f7 = brightnessup
+f8 = mute
+f9 = volumedown
+f10 = volumeup
+
+## Allow F1-10 access through meta+fnX
+[meta]
+f1 = f1
+f2 = f2
+f3 = f3
+f4 = f4
+f5 = f5
+f6 = f6
+f7 = f7
+f8 = f8
+f9 = f9
+f10 = f10
+
+## Allow TTY access
+[control+alt]
+f1 = C-A-f1
+f2 = C-A-f2
+f3 = C-A-f3
+f4 = C-A-f4
+f5 = C-A-f5
+f6 = C-A-f6
+f7 = C-A-f7
+f8 = C-A-f8
+f9 = C-A-f9
+f10 = C-A-f10