Add knip integration, refactor code, and update CI workflow

[J3m5]

This pull request introduces the following improvements:

• Added knip as a devDependency, with scripts for running and auto-fixing unused code and dependencies.
• Removed unused devDependencies and cleaned up related lockfile entries.
• Changed some TypeScript interfaces to non-exported where not needed in src/hydra/fetchJsonLd.ts and src/hydra/types.ts.
• Added Prettier formatting scripts to address knip error and ensure consistent code style.
• Updated CI workflow to include a step for running knip after test coverage.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🟢	Lines	71.35% (🎯 70%)	289 / 405
🟢	Statements	71.39% (🎯 70%)	292 / 409
🟢	Functions	71.64% (🎯 70%)	48 / 67
🟢	Branches	59.63% (🎯 58%)	229 / 384

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/hydra/fetchJsonLd.ts	100%	95%	100%	100%

Generated in workflow #236 for commit 21fe9e1 by the Vitest Coverage Report Action