Track B of #79 — clean-slate extraction mirroring the note-* pattern.

Changes:
- packages/ocr-swift/ -> PsychQuant/ocr-swift v0.1.0 (new public repo)
  - 5 Swift sources (OCRPipeline, OCRBackend, MLXBackend, OllamaBackend,
    PDFKitExtractor) — byte-identical to previous local version
  - .gitignore excludes .build/, .swiftpm/, Package.resolved
- Package.swift: .package(name: "OCRSwift", path: ...) -> .package(url:)
- Package.swift: product ref .product(name: "OCRCore", package: "OCRSwift")
  -> package: "ocr-swift" (lowercase identity matches remote URL basename)

Critical: PR #84's Qwen3-VL/OCRBackend wiring in PageOCRRunner.swift was
specifically verified to compile against MLXBackend(modelConfig:) /
OllamaBackend(host:) / OCRPipeline(backend:) from the new url dep.
swift build: 6.28s clean link, no consumer breakage.

Pre-existing dependency pins preserved: note-core-swift@0.1.3,
note-to-pdf-swift@0.1.2, word-builder-swift@0.9.0, ooxml-swift@0.7.0,
pdf-to-latex-swift@0.1.0.

Refs #79

Track C of #79 — delete dead scaffolding that declared a testTarget
with .copy("Fixtures") resources but had zero test files and empty
Fixtures/ subdirectory. Matches reality (no tests exist) and follows
#81's "real tests only" philosophy.

If WordToMDSwift coverage is wanted later, a separate issue can
create real smoke tests with proper fixtures — not placeholder
scaffolding that looks like infrastructure but produces no assertions.

swift test: 28 tests still green (26 Swift Testing + 2 XCTest), no
regression.

Refs #79

…79 Track D fix)

Track D clean-clone verification surfaced 3 additional gitignored
packages that #79's original scope didn't anticipate:
- packages/bib-apa-to-html-swift (20 KB source)
- packages/bib-apa-to-json-swift (4 KB source)
- packages/bib-apa-to-md-swift (12 KB source)

All 3 were matched by .gitignore's blanket 'packages/' rule and
referenced by macdoc Package.swift as .package(name:, path:) deps —
same pattern as #78's note-* and #79's pdf-to-latex/ocr-swift.

Decision: Option (b) from issue #79 — whitelist + commit in-tree
(matches srt-to-html-swift, md-to-html-swift, html-to-md-swift,
marker-word-converter-swift, tex-to-docx-swift precedent). These are
small (36 KB total), don't have a compelling independent-repo story,
and the 2 existing private remotes under apa-bib-* naming would
require rename + make-public ceremony for no real benefit.

This completes #79's Phase 5 audit and unblocks clean-clone
'git clone && swift build' verification.

Refs #79

Track E of #79 — add rows for the newly-extracted remote repos:
- pdf-to-latex-swift @ PsychQuant/pdf-to-latex-swift (from Track A)
- ocr-swift @ PsychQuant/ocr-swift (from Track B)

Sub-Repositories table now reflects the remote url-dep status.

Refs #79