Name: canned vines, tangle root
Description: this suggestion adds 2 things First a weed like crop called tangle root that rapidly grows and can be harvested for either vines. and second is a spray can that will place a vine where you aim it and every on block directly below it to the base of the wall (I don't want to try to explain it in detail please try not to imagine it in a way that allows you to easily make a vine ladder from the world height to bed rock you know that is not what i mean) so now ON TO THE DETAILS!
tangle root growth requirements should be implemented in such a way as to make it so that they can grow unassisted in a swamp biome or jungle biome (where you normally find vines) and require a clay block beneath the dirt block to reach its final stage (and just to mess with people the first stage looks like the weeds first stage) it is discovered through crossbreeding. with melons and pumpkins being good candidates for parents(because they have vines)
canned vines is made by combining
[CF pellet]+[tangle root seed bag(any GGR)]+[empty cell]
with this the seeds are embedded in the cf pellet and the ingredients of the unhardened cf will energize the seeds which will try to grow aggressively at the earliest opportunity then just aim and fire a vine will instantly be placed on the block you pointed and a few seconds later you will see it start rapidly growing straight down till a block blocks its path.