MNTM Settings: Add Skip Sliding Animations option for Lockscreen (#436)

* Add Fast Lock/Unlock
The cover animation takes time and blocks input while animating, so add options to skip the animations.

* Combine options into "Skip Sliding Animation"

* Update changelog

* Wording

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Co-authored-by: WillyJL <me@willyjl.dev>

lib/momentum/settings.h

@@ -80,6 +80,7 @@ typedef struct {
     bool lockscreen_statusbar;
     bool lockscreen_prompt;
     bool lockscreen_transparent;
+    bool lockscreen_skip_animation;
     BatteryIcon battery_icon;
     bool status_icons;
     bool bar_borders;