[codex] Add ForestMamba Galaxy wrapper

[kgerb]

Summary

Adds a Galaxy wrapper for ForestMamba under tools/3dtrees_forestmamba.

• adds forestmamba.xml modeled after the existing 3Dtrees SegmentAnyTree wrapper
• sets tool version 1.0.0+galaxy0
• uses the local Docker image forestmamba-3dtrees-runtime-readable:latest for now
• calls /workspace/src/run.py with parameters from the Galaxy XML
• does not pin CUDA_VISIBLE_DEVICES; GPU allocation is left to the Galaxy/runtime scheduler
• exposes only the user-facing bluepoint controls; operational defaults such as chunk size, dimension names, checkpoint, config path, and spatial matching tolerance are hidden
• includes mikro.laz as test data and a deterministic missing-checkpoint failure test

Visible Parameters

• Input LAZ/LAS point cloud: the point cloud to segment.
• Bluepoint iterations: 0 runs normal one-pass inference; 2 enables the dense-forest bluepoint flow.
• Bluepoint score threshold: optional model confidence threshold override for bluepoint runs.
• Second pass threshold: fraction of first-pass non-ground points with raw instance_pred == -1 required before the second bluepoint pass runs. Default 0.01 means more than 1%.

WANDB_MODE=disabled is set internally to prevent upstream Weights & Biases experiment logging during Galaxy jobs.

Related PRs

• ForestMamba code PR: [codex] Add 3dtrees ForestMamba LAZ wrapper 3Dtrees_ForestMamba#2
• Parent 3dtrees submodule PR: https://github.com/3dTrees-earth/3dtrees/pull/221

Validation

• XML parse check with xml.etree.ElementTree
• planemo lint tools/3dtrees_forestmamba/forestmamba.xml passed

Runtime Note

A GPU0 Docker run against mikro.laz was attempted with forestmamba-3dtrees-runtime-readable:latest, but Docker startup/exec hung before the wrapper command produced output. The GPU test still needs to be rerun once the local Docker runtime is responsive.