Added actions_on_button_press

actions_on_button_press/README.md

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+# Actions On Button Press
+
+This script shows how you can execute functions and change dvars for a player when that player presses a certain button while showing him instructions on his screen using the key defined in his game.
+
+If you use `+melee` and the player's melee key is set to V it'll show V on his screen, if he uses another key it'll show his key.
+
+* The first button  lets the player toggle the `camera_thirdPerson` dvar (used to play in third person while keeping the crosshair on and is also better/more configurable than `cg_thirdPerson` in my opinion)
+Note that `camera_thirdPerson` is a special case and needs to be changed with `SetDynamicDvar()` but in most cases like with `cg_thirdPerson` you'd use `SetDvar()` instead.
+
+* The second button lets the player suicide using the `Suicide()` function.
+
+If you want to use another button simply change `level.third_person_button` and/or `level.suicide_button` values and it will update the button pressed to start the function and the text displayed on the player's screen.
+
+I used actionslot 6 and 7 because (to my knowledge) they are not used by anything else in the game
+Here is a non-exhaustive list of buttons you can use
+```
+"+usereload"
+"weapnext"
+"+gostand"
+"+melee"
+"+actionslot 1"
+"+actionslot 2"
+"+actionslot 3"
+"+actionslot 4"
+"+actionslot 5"
+"+actionslot 6"
+"+actionslot 7"
+"+frag"
+"+smoke"
+"+attack"
+"+speed_throw"
+"+stance"
+"+breathe_sprint"
+```