refactor: remove unused imports from platform handlers and tests

[nesjett]

Removes unused imports.

[github-actions]

LCOV of commit 83d8e5e during CI #2

Summary coverage rate:
  lines......: 98.7% (1207 of 1223 lines)
  functions..: 100.0% (84 of 84 functions)
  branches...: 99.1% (232 of 234 branches)

Files changed coverage rate: n/a

[Copilot]

Pull request overview

This PR removes unused imports from platform handlers and test files to improve code cleanliness and maintainability. The changes are purely cosmetic refactoring with no functional impact.

Changes:

• Removed unused type imports from platform handlers (AgentConfig, Platform, Skill, Rule types)
• Removed unused test helper imports (writeFixture, readFixture)
• Removed unused utility imports (log function)

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/platforms/base_test.ts	Removed unused AgentConfig and Platform type imports
tests/commands/list_test.ts	Removed unused writeFixture test helper import
tests/commands/import_test.ts	Removed unused readFixture test helper import
src/platforms/windsurf.ts	Removed unused Skill type import
src/platforms/cursor.ts	Removed unused Rule type import (kept Skill as it's used)
src/platforms/claude.ts	Removed unused Skill type import
src/commands/list.ts	Removed unused log utility import

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