updated pdfparser

Track the cosmocode prinsfrank/pdfparser dev fork

The dev fork adds native UTF-16BE Info-string decoding and Form-XObject
text extraction. Point composer at the fork's VCS repo, pin dev-dev, and
dro

Track the cosmocode prinsfrank/pdfparser dev fork

The dev fork adds native UTF-16BE Info-string decoding and Form-XObject
text extraction. Point composer at the fork's VCS repo, pin dev-dev, and
drop the now-redundant normalizePdfString() UTF-16BE shim (metadata values
just get trimmed). Refresh AGENTS.md accordingly.

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Replace smalot/pdfparser with prinsfrank/pdfparser

Switch the PDF extractor from the cosmocode/pdfparser memory fork
(an LGPL smalot/pdfparser fork) to prinsfrank/pdfparser (MIT, built
from scratch,

Replace smalot/pdfparser with prinsfrank/pdfparser

Switch the PDF extractor from the cosmocode/pdfparser memory fork
(an LGPL smalot/pdfparser fork) to prinsfrank/pdfparser (MIT, built
from scratch, zero PHP dependencies beyond prinsfrank/glyph-lists).

PdfExtractor now calls parseFile($path)->getText() in the default
in-memory mode, which benchmarked both faster and far lighter than the
old fork (on a 12 MB/92-page file: 63s/49.5MB vs 68s/100MB), so the
previous setRetainImageContent() tuning is no longer needed.

Known limitation: prinsfrank/pdfparser <= v3.1.0 does not extract text
inside Form XObjects (page content painted with the Do operator, common
in Quartz/Firefox/Chrome PDFs such as the Tika sample), so
PdfExtractorTest::testExtractsText fails against stock v3.1.0.

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Switch to the cosmocode/pdfparser memory fork

Replace the upstream smalot/pdfparser dependency with our own fork
(cosmocode/pdfparser, dev-memory branch) for its lower-peak-memory
streaming parser.

Switch to the cosmocode/pdfparser memory fork

Replace the upstream smalot/pdfparser dependency with our own fork
(cosmocode/pdfparser, dev-memory branch) for its lower-peak-memory
streaming parser. The fork keeps the smalot/pdfparser package name, so
it is wired in as a vcs repository in composer.json and required as
dev-memory; the vendored copy and lock file are regenerated accordingly.

PdfExtractor is unchanged - the public API it uses
(Config::setRetainImageContent(), Parser::parseFile()) is identical.

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Initial implementation of the totext plugin

Extract plain text from various file formats using PHP only (no shell-outs,
no external binaries). Provides a CLI component (cli_plugin_totext) and a
help

Initial implementation of the totext plugin

Extract plain text from various file formats using PHP only (no shell-outs,
no external binaries). Provides a CLI component (cli_plugin_totext) and a
helper component (helper_plugin_totext).

Supported formats:
- OOXML: docx, xlsx, pptx
- OpenDocument: odt, ods, odp
- PDF (via bundled smalot/pdfparser)
- Plain-text family: txt, csv, md, markdown, log, text
- Image metadata (EXIF/IPTC): jpg, jpeg, tif, tiff

Includes a fixture-based test suite covering every extractor, the factory
routing, and the helper end to end.

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