Storage - Fur & A-Frame balance

[LambdaSix]

When CleverRaven/Cataclysm-DDA#39406 is more mainstream rework the storage.

With the new hauling mechanic, it's less onerous to move foraged materials back to a central camp location. So we can push some of the early storage back a little bit in terms of resources and reduce the storage size.

Looped Cordage Bag

No change to materials
Storage reduced to 6L with a minimum item size of 500ml, non-rigid
Craft time still around 2 hours
Min/Max encumbrance: 1/6

Should only holds things at least 500ml in size since it's basically a net bag and small items would fall out of the gaps.

Birchbark Pouch

No change to materials, time to 45minutes or so.
Should hold up to 4L but with no minimum item size, rigid container
Encumbrance: 5

Similar to the cloth/leather pouches, is strapped onto the waist. Possibly after the tailoring changes allowing easier clothing mods is mainlined, this can be used as an item mod on a cloth pouch belt of some kind to allow modular early game storage.

Birchbark Basketpack

New item, based on Birchbark Pouch but a larger basket with two straps to allow carrying on the back similar to a backpack, slow to access but stores 7L with no minimum item restrictions and a fixed encumbrance of 10.
Should take about 2 hours to construct from weaving birchbarks.

The A-Frame Backpack

The cordage frame backpack should stay but the birchback variant should use the basketpack instead. Base encumbrance value of 10 regardless of the type.

The advantage to using the A-Frame over the others being that the frame itself comes with 3 gear loops:

• Rollmat, stores a STRAP_ROLLMAT* flagged item
• Axe loop, stores a SHEATH_AXE flagged item
• Knife sheath, stores a SHEATH_KNIFE flagged item

With Tailoring Mods:

• Quiver, a small 10 arrow quiver attached to the frame, slower to access but integrated
• Spear/Sword frog, allows storing a spear or sword on the side of the frame.
• Tent strap, additional ot the rollmat strap, allows storing a STRAP_TENT* flagged item

Making the a-frame quite a useful item to have in of itself, but requiring a few extra materials to put together. Possibly when tailoring mods are mainlined, push the Rollmat/Axe/Knife loops off into simple modifications to the basic frame so the survivor can customise the frame to their own needs.

[ ] *Investigate adding new flags, Code PR required?