Replace legacy localization and adapter with VKS GICP interface

[FieldDiTian]

Replace gicp_localization/ with the current gicp_interface/ package and remove the outdated Atlas adapter/ from ucb-roar. The imported package tree exactly matches airacingtech/gicp_interface commit 715f7ed, preserving its car-tested Laguna configuration and current standalone/component interfaces.

The workspace now uses the existing /vks/imu, /vks/filtered_odom, and /vks/wheels inputs for vehicle localization. Remove the adapter-dependent scripts/prep_bag.py workflow: localization replays existing bags directly, and GLIM reads existing bags directly through glim_rosbag. The existing GLIM configuration generator now defaults to VKS IMU and Odometry inputs; no bag normalization or merge stage is required.

Integration changes:

• Update the dlio metapackage to depend on gicp_interface, remove both obsolete dependencies, and declare its ament build dependency.
• Retain GLIM and GICP_plusplus; mapping algorithm code is unchanged.
• Rewrite the root and GLIM READMEs for the current build, launch, direct-bag, calibration, and ENU-export workflow. Mark historical review/experimental instructions so they do not override the new setup.
• Preserve the existing dependency environment, including external small_gicp and race_msgs, and the imported package's topics, QoS, frames, tuning, and installed profile alias.

Validation on the combined workspace:

• All six packages built successfully: gicp_interface, gicp_plusplus, glim, glim_ext, glim_ros, and dlio.
• Existing tests: 24 passed, 0 errors, 0 failures, 0 skipped.
• Package discovery resolves all six to this worktree's install directory.
• The imported standalone launch loads a synthetic PCD with the Laguna profile and shuts down cleanly.
• The GICP component loads with intra-process communication enabled and advertises the expected Odometry type and BEST_EFFORT reliability. DDS discovery does not expose the configured history depth on this host; keep-last(100) remains verified in the unchanged source.
• Generated mapping configuration selects /vks/imu and /vks/filtered_odom with nav_msgs/msg/Odometry.
• The imported GICP tree exactly matches 715f7ed; removed packages/preparation script are absent; diff checks pass.