statup menu ui added and fixes: readded xr interaction toolkit thats accidentally deleted. and added fixed gitignore

by select changes Revert "Created scene, prefabs and scripts for startup UI"

This reverts commit 4dd64bd0.

requested review from @mhz1g21

assigned to @mhby1g21

approved this merge request

changed title from readded xr interaction toolkit thats accidentally deleted. and added fixed gitignore to statup menu ui added and fixes: readded xr interaction toolkit thats accidentally deleted. and added fixed gitignore

changed the description

approved this merge request

mentioned in commit 91a02e74

merged