Add AFK Sandstone

[alexandevcom]

Sandstone mining helper for the Desert Quarry. Features:

• Session tracker: live inventory sand yield (1kg=1, 2kg=2, 5kg=4, 10kg=8 buckets), grinder capacity parsed from chat and NPC dialog, sand/hr production rate, and elapsed time
• Idle flash when mining animation stops; full-inventory flash when carrying 28/28
• 3D convex-hull outlines on active sandstone rocks, name-matched so granite and other rocks are ignored

Repo: https://github.com/alexandevcom/afk-sandstone

[runelite-github-app]

New plugin afk-sandstone: https://github.com/alexandevcom/afk-sandstone/tree/f2a7cdc2046aa1ffc9a50896708516d95846bfa0

[runelite-github-app]

Internal use only: Reviewer details Maintainer details