feat(pdf): add PDF metadata editor

[rwv]

Summary

• add a new offline PDF Metadata Editor tool for reading, updating, clearing, and downloading standard PDF metadata
• split the editor UI into focused sections and register the tool in the PDF registry/routes
• add DOM tests for the new tool package and keep package coverage at 100%

Verification

• pnpm format-check
• pnpm lint-check
• pnpm type-check
• pnpm exec vitest run tools/pdf/pdf-metadata-editor/src --project dom --coverage --coverage.include="tools/pdf/pdf-metadata-editor/src/**/*.{ts,vue}" --coverage.thresholds.lines=100 --coverage.thresholds.statements=100 --coverage.thresholds.functions=100 --coverage.thresholds.branches=100

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	96.36% (🎯 95%)	34492 / 35794
🔵	Statements	96.24% (🎯 94%)	38101 / 39589
🔵	Functions	96.49% (🎯 95%)	12602 / 13060
🔵	Branches	92.77% (🎯 89%)	16958 / 18278

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
registry/tools/src/index.ts	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/PDFMetadataEditorView.vue	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/index.ts	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/info.ts	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/routes.ts	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/components/PDFMetadataCurrentSection.vue	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/components/PDFMetadataEditorSections.vue	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/components/PDFMetadataEditorTool.vue	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/components/PDFMetadataFormSection.vue	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/components/PDFMetadataSaveSection.vue	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/components/PDFMetadataSectionHeader.vue	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/components/PDFMetadataUploadSection.vue	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/composables/usePdfMetadataEditor.ts	100%	100%	100%	100%
tools/pdf/pdf-metadata-editor/src/utils/pdfMetadata.ts	100%	100%	100%	100%

Generated in workflow #1357 for commit da29c3f by the Vitest Coverage Report Action