The four skills ('archery', 'blowgun use', 'crossbow use', 'sling use'), should start appearing on guild/subguild trees as the week goes on.
There's code in place (for decades) that ensures any skills that appear on your character's guild/subguild tree that your character doesn't currently have get added at login.
With regards to crafting for arrows, bullets, darts, and bolts - nothing has changed, there. Bullets can still be foraged/crafted while arrows/bolts/darts can still be crafted off of fletchery.