Add editor robot navigation and task workflows

[Niutels]

What does this PR do?

Adds robot navigation and robot task workflows as an isolated @pascal-app/robot package with minimal app/editor integration.

Robot package:

• Adds Manual mode and Task mode robot workflows.
• Owns robot runtime state, task queue state, pathing, movement, copy, move, delete, and repair actions.
• Owns robot-only visuals including carried-item visuals, destination ghosts, item action overlays, selected-item outlines, shader cone tooltip overlays, delete fades, and task loop reset behavior.
• Adds Pascal truck behavior, robot asset/model selection, walkable-surface generation, navigation systems, and door interaction logic.
• Keeps robot/task state runtime-owned instead of storing transient robot state as durable scene data.

App / layout integration:

• Keeps the current community editor layout intact.
• Injects the robot entry point into the existing CommunityViewerToolbarRight toolbar through a small before slot.
• Wraps the viewer with the robot viewer frame only from the app integration points.
• Prepares loaded scenes by stripping transient robot metadata and hiding the Pascal truck outside robot modes.
• Pauses autosave while robot runtime operations are active so transient robot visuals are not persisted accidentally.

Editor integration:

• Adds thin extension points so external runtime modes can pause editor-owned selection, tools, cursors, action menus, helper overlays, and placement behavior while robot mode is active.
• Resets editor interaction state when entering robot modes so normal editor manipulation state does not mix with robot manipulation state.
• Adds small item-placement support needed by robot workflows, including ignored item IDs, disabled placement handlers, preview clone handling, and commit interception.
• Adds a generic first-person collider hardening fix for merged geometries.
• Adds a repair action hook to the existing floating item action menu.

Viewer:

• Does not add robot-specific viewer behavior.
• Only includes a small generic WebGPU device/error handler typing hardening.

Core:

• No robot feature logic is added to packages/core.
• The robot feature keeps authored scene data separate from robot runtime/task state.

How to test

1. Use the robot toolbar to switch between Manual mode, Task mode, Pascal robot, and armored robot.
2. In Manual mode, right-click a destination and confirm the robot navigates there.
3. In Task mode, run representative task workflows: move, copy, delete, repair, duplicate copy, and queued loop behavior.

Validation notes

• bun run check-types passes.
• git diff --check origin/main...HEAD passes.
• bun run check is left unchecked because it currently fails on origin/main itself in this Windows checkout due repo-wide Biome/CRLF baseline issues. A temporary origin/main worktree reported the same class of failures, so this is not branch-specific.
• Documentation is left unchecked because this PR adds editor runtime/UI behavior, and the repo does not currently maintain user-facing workflow docs for these editor tools.

Screenshots / screen recording

Checklist

• I've tested this locally with bun dev
• This PR targets the main branch