dicomtk 0.1.0

• Initial release of dicomtk, a full rebuild of the dcmtk R wrapper synchronized with OFFIS DCMTK 3.7.1 (PS 3.6-2026d).
• Bundled the complete 5,354-tag DCMTK 3.7.1 data dictionary, all 23 module header trees (inst/include/dcmtk/), and a self-contained C++17 / Rcpp engine requiring no external installation.
• Added tidyverse-compliant DICOM I/O and tag functions (read_dicom(), read_dicom_header(), read_dicom_pixels(), read_dicom_series(), write_dicom(), dicom_tags(), dicom_tag_value(), dicom_modify(), dicom_tag_lookup()).
• Added HIPAA Safe Harbor and DICOM PS3.15 de-identification (dicom_anonymize()) with date shifting, private tag removal, and UID regeneration.
• Added ggplot2 visualization (plot_dicom(), ggdicom(), dicom_window() with clinical CT presets), interactive Shiny viewer (dicom_viewer()), and 3D volume rendering (render_volume() with MPR, MIP, and rgl).
• Added PACS networking (dicom_connect(), dicom_echo(), dicom_find(), dicom_get(), dicom_send(), dicom_receive(), dicom_qrdb_index(), dicom_worklist(), dicom_tls_config()).
• Added Structured Reporting and specialized IOD interfaces (read_dicom_sr(), create_dicom_sr(), read_dicom_rt(), read_dicom_seg(), read_dicom_pmap(), read_dicom_tract(), read_dicom_pstate(), read_dicom_ect(), dicom_verify_signature()).
• Added unified LLM integration (dicom_llm(), dicom_summarize(), dicom_describe_image(), dicom_report(), dicom_ask()) supporting local Ollama and OpenAI-compatible APIs (OpenAI, Anthropic Claude, Azure, vLLM, LM Studio).
• Maintained full backward compatibility with legacy dcmtk functions (dcmdump(), dcmhd(), wide_hdr(), burned_annot(), dcmodify(), dcm_anon(), dcm_subtract_date(), dcmj2pnm(), dcmdjpeg(), dcmdrle(), dcmcrle()).