Change default inventory key to E, default Aux1 key to F

[minlemon]

• Fixes Default inventory key "I" should be changed to something more natural #16052
• Fixes unnatural default keybinding for inventory by making it key E (instead of the old I), the default also for Minecraft
• Sets default Aux1 key to F (to make room for E)

To do

This PR is Ready for Review.

• Check there are no other places the default keybinding for inventory, Aux1 is specified
• After merging: update docs page /for-players/controls/

How to test

Launch a new game that uses inventory and Aux1 (e.g. VoxeLibre). Press E for inventory. Hold F to run.

[lhofhansl]

IMHO... why change the default? If folks want to change it, they have the option.

[minlemon]

IMHO... why change the default? If folks want to change it, they have the option.

Please review the discussion in #16052. The short answer is that the default inventory key of "I" cannot be pressed without looking down at the keyboard and Luanti should come with solid defaults. As a case study Minecraft started with inventory key being "I" but switched to "E" after user feedback.

[sfan5]

Adding to milestone, because I think we should decide this before release.