BREAKING CHANGE: Replace option-t Result with ScrapboxResponse

- Remove option-t dependency
- Add ScrapboxResponse class extending web standard Response
- Improve type safety with status-based type switching
- Allow direct access to Response.body and headers
- Add migration guide for v0.30.0

This change follows the implementation pattern from @takker/[email protected]
and prepares for release as version 0.30.0.

Resolves takker99#213

- Remove option-t dependency
- Implement TargetedResponse interface following @takker/[email protected]
- Use @std/http for StatusCode and SuccessfulStatus
- Add utility functions for response creation
- Translate Japanese comments to English
- Update all REST API endpoints to use new interface

- Update imports in page-data.ts, link.ts, parseHTTPError.ts, and pages.ts
- Remove deno.lock for clean environment setup

- Remove type keyword from imports where functions are used
- Update remaining ScrapboxResponse references to TargetedResponse in search.ts
- Fix unused imports across REST API files

- Remove type keyword from imports where functions are used
- Fix remaining unused imports in REST API files
- Update import statements to match actual usage

- Add _createErrorResponse and _createSuccessResponse aliases for unused imports
- Add _TargetedResponse alias for unused type imports
- Fix remaining linting errors across REST API files

- Add _TargetedResponse alias for unused type imports in multiple files
- Fix remaining linting errors in REST API files

- Update import path in targeted_response.ts to use jsr:@std/http
- Fix module resolution error

- Update import path in utils.ts to use jsr:@std/http
- Fix module resolution error

…e.ts to use JSR format

- Update import paths in code examples to use jsr:/@std/json@^1.0.1/types
- Update import paths in code examples to use jsr:/@std/testing@^1.0.8/types

…or handling