feat(asset): add animator, clip, and atlas authoring

[akiojin]

Summary

• Add create_animator_controller, create_animation_clip, and create_sprite_atlas so sprite-driven asset authoring workflows can be automated from unity-cli.
• Extend asset import normalization, strict tool schemas, and user-facing docs so invalid sprite and atlas payloads fail early and the new commands are discoverable.
• Update canonical asset-management spec #81 so the new authoring commands share one reviewed scope for asset pipeline automation.

Changes

• src/tooling/tool_catalog.rs, src/app/runner.rs, src/core/config.rs, src/lsp/client.rs: register the new tools, expand strict validation coverage, and stabilize affected Rust test fixtures.
• UnityCliBridge/Packages/unity-cli-bridge/Editor/Core/UnityCliBridgeHost.cs, UnityCliBridge/Packages/unity-cli-bridge/Editor/Handlers/AssetManagementHandler.cs, UnityCliBridge/Packages/unity-cli-bridge/Editor/Handlers/AssetImportSettingsHandler.cs, UnityCliBridge/Packages/unity-cli-bridge/Editor/Helpers/PlayModeCommandPolicy.cs: implement AnimationClip and SpriteAtlas authoring, sprite import normalization, bridge dispatch, and Play Mode blocking.
• UnityCliBridge/Packages/unity-cli-bridge/Tests/Editor/Handlers/AssetManagementHandlerTests.cs: add EditMode coverage for animator controllers, animation clips, and sprite atlases.
• docs/tools.md, .claude-plugin/plugins/unity-cli/skills/unity-asset-management/SKILL.md, scripts/e2e-all-tools.sh, scripts/skill-eval/static-skill-contract-check.sh: document the commands and add smoke and contract coverage.

Testing

• cargo test --all-targets — expected 218 passed.
• cargo clippy --all-targets -- -D warnings — expected success with no warnings.
• cargo run -- raw run_tests --host 127.0.0.1 --port 6401 --json '{"testMode":"EditMode","filter":"UnityCliBridge.Tests.AssetManagementHandlerTests","includeDetails":true}' --output json — expected status: "completed" and totalTests: 13.
• cargo run -- raw manage_asset_database --host 127.0.0.1 --port 6401 --json '{"action":"copy_asset","fromPath":"Assets/Materials/Dice/DiceTexture.png","toPath":"Assets/Scenes/Generated/E2E/Smoke_122_123.png"}' --output json then cargo run -- raw manage_asset_import_settings --host 127.0.0.1 --port 6401 --json '{"action":"modify","assetPath":"Assets/Scenes/Generated/E2E/Smoke_122_123.png","settings":{"textureType":"Sprite","generateMipMaps":false,"filterMode":"Bilinear"}}' --output json then cargo run -- raw create_animation_clip --host 127.0.0.1 --port 6401 --json '{"clipPath":"Assets/Scenes/Generated/E2E/Smoke_122_123.anim","overwrite":true,"spritePaths":["Assets/Scenes/Generated/E2E/Smoke_122_123.png","Assets/Scenes/Generated/E2E/Smoke_122_123.png"],"frameRate":12,"loopTime":true}' --output json then cargo run -- raw create_sprite_atlas --host 127.0.0.1 --port 6401 --json '{"atlasPath":"Assets/Scenes/Generated/E2E/Smoke_122_123.spriteatlas","overwrite":true,"packables":["Assets/Scenes/Generated/E2E"],"packingSettings":{"padding":4,"allowRotation":false,"tightPacking":true},"textureSettings":{"filterMode":"Bilinear","generateMipMaps":false}}' --output json — expected success: true for both authoring commands.

Related Issues / Links

• feat: add create_animator_controller command #121
• feat: add create_animation_clip command #122
• feat: add create_sprite_atlas command #123
• 機能仕様書: Asset/Prefab/Material管理機能 #81

Checklist

• Tests added/updated
• Lint/format passed (cargo fmt --all, cargo clippy --all-targets -- -D warnings; svelte-check N/A: not a Svelte project)
• Documentation updated (if user-facing change)
• Migration/backfill plan included — N/A: no schema or data migration
• CHANGELOG impact considered — N/A: no breaking change to flag

Context

• Asset pipeline automation needed three new authoring commands on the same feature branch, and #81 was updated as the canonical spec for animator, clip, and atlas asset creation.
• The branch keeps CLI schema, Unity bridge handlers, tests, docs, and smoke coverage in sync for the same asset-authoring surface.

Notes

• scripts/e2e-all-tools.sh still reports pre-existing failures outside these new asset authoring commands, so this PR relies on focused EditMode coverage and direct raw smoke checks for the new paths.

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