docs: reorganize Go2 platform docs + map framing default

[jeff-hykin]

Move premap stuff to go2 since its go2 specific. Touch up go2 docs.

[greptile-apps]

Greptile Summary

This PR reorganizes the Unitree Go2 documentation from a single large page into focused sub-pages (setup, simulation, premap), and changes the dimos map CLI default from body-frame to world-registered (Go2/fastlio) operation, replacing the --go2 flag with --use-tf for the non-default case.

• Docs restructure: index.md becomes a hub; content is split into setup.md, simulation.md, and premap.md. All three sub-pages are now listed in docs.json so they appear in the sidebar.
• CLI flag rename: --go2 is replaced by --use-tf (inverted semantics); the _accumulate function's world_frame default flips from False to True, making world-registered clouds the default for all three call sites.
• Recording fix: Go2Memory gains explicit @pose_setter_for methods so odom and lidar frames are anchored using the live odometry pose rather than a tf-tree lookup.

Confidence Score: 5/5

Safe to merge — the code changes are small and internally consistent, and the docs reorganization is additive.

The CLI default flip is intentional and consistently applied across all three _accumulate call sites. The new @pose_setter_for methods follow the documented pattern in the Recorder base class and the PoseStamped-extends-Pose relationship makes the return types valid. The documentation changes correctly address the previously flagged missing docs.json entries, and all referenced installation files exist. No functional regressions were found.

No files require special attention.

Important Files Changed

Filename	Overview
dimos/mapping/utils/cli/map.py	Renames --go2 flag to --use-tf with inverted semantics and flips world_frame default from False to True; all three _accumulate call sites updated consistently to world_frame=not use_tf.
dimos/robot/unitree/go2/blueprints/smart/unitree_go2.py	Adds explicit @pose_setter_for methods so the odom stream records its own pose and the lidar stream borrows the latest odom pose; PoseStamped extends Pose so the return types are valid.
docs/docs.json	Expands the flat platforms/quadruped/go2/index entry into a nested Unitree Go2 group containing all four sub-pages, making them fully discoverable in the sidebar.
docs/platforms/quadruped/go2/index.md	Converted from a long monolithic guide into a concise hub page linking to the three new sub-pages; blueprint table updated with runnable dimos run commands.
docs/platforms/quadruped/go2/setup.md	New page split from the old index, covering requirements, install, first-time WiFi setup, pre-flight checks, running DimOS, and agentic control; all referenced installation links resolve correctly.
docs/platforms/quadruped/go2/premap.md	Renamed from capabilities/mapping/relocalization.md and updated to use the new dimos map global subcommand; all four example invocations correctly omit the deprecated --go2 flag (now the default behavior).
docs/platforms/quadruped/go2/simulation.md	New page split from the old index covering the replay and MuJoCo simulation paths; content is accurate and concise.

_{Reviews (3): Last reviewed commit: "-" | Re-trigger Greptile}

[codecov]

Codecov Report

❌ Patch coverage is 70.00000% with 3 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
.../robot/unitree/go2/blueprints/smart/unitree_go2.py	70.00%	3 Missing ⚠️

@@            Coverage Diff             @@
##             main    #2566      +/-   ##
==========================================
- Coverage   69.59%   69.59%   -0.01%     
==========================================
  Files         878      878              
  Lines       79311    79320       +9     
  Branches     7126     7126              
==========================================
+ Hits        55200    55206       +6     
- Misses      22310    22314       +4     
+ Partials     1801     1800       -1     

Flag	Coverage Δ
OS-ubuntu-24.04-arm	62.99% <70.00%> (+<0.01%)	⬆️
OS-ubuntu-latest	65.82% <70.00%> (+<0.01%)	⬆️
Py-3.10	65.82% <70.00%> (+<0.01%)	⬆️
Py-3.11	65.82% <70.00%> (+0.01%)	⬆️
Py-3.12	65.82% <70.00%> (+<0.01%)	⬆️
Py-3.13	65.82% <70.00%> (+<0.01%)	⬆️
Py-3.14	65.83% <70.00%> (+<0.01%)	⬆️
Py-3.14t	65.82% <70.00%> (+<0.01%)	⬆️
SelfHosted-Linux	37.80% <70.00%> (-0.01%)	⬇️
SelfHosted-macOS	36.59% <70.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
dimos/mapping/utils/cli/map.py	38.88% <ø> (-2.23%)	⬇️
.../robot/unitree/go2/blueprints/smart/unitree_go2.py	92.50% <70.00%> (-7.50%)	⬇️

... and 3 files with indirect coverage changes

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