So active this commuity :/
haha, it was only 1 hour 10 minutes between posts
...and usually more people help if you attempt to create it and ask for help when you have issues.
Wall slide - decrease max fall speed while wall sliding and change animation
Wall jump - when in contact (wall left/right) with wall and input detected then bump Y vector
Also, these feature are quite commonplace and if you search you can probably find lots of tutorials and forum posts on these topics. So instead of mocking "the community" help yourself first and others will help.