feat: add pdf_master plugin

[chedevlooper-creator]

Plugin: PDF Master

Kapsamlı PDF aracı - PDF belgelerini okuma, düzenleme, açıklama ekleme ve OCR işlemleri yapın.

• GitHub: https://github.com/chedevlooper-creator/pdf_master
• Tags: tools, documents, ocr, pdf, automation

[Copilot]

Pull request overview

Adds the PDF Master plugin entry to the plugin catalog so it can be discovered/installed from the repository plugin list.

Changes:

• Introduces plugins/pdf_master/index.yaml with plugin metadata (title, description, GitHub URL, tags).

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[Copilot]

The plugin index descriptions in this repo appear to be consistently written in English (e.g., plugins/_example1/index.yaml:2, plugins/a0_agent_skills/index.yaml:2). This new description is Turkish; consider adding an English description (or making it bilingual) to keep the catalog consistent and searchable.

Suggested change

	description: Kapsamlı PDF aracı - PDF belgelerini okuma, düzenleme, açıklama ekleme ve OCR işlemleri yapın. Tüm OCR kütüphaneleri dahil.
	description: Comprehensive PDF tool - Read, edit, annotate, and perform OCR on PDF documents. All OCR libraries included. / Kapsamlı PDF aracı - PDF belgelerini okuma, düzenleme, açıklama ekleme ve OCR işlemleri yapın. Tüm OCR kütüphaneleri dahil.

[Copilot]

The index.yaml description includes the additional claim "Tüm OCR kütüphaneleri dahil." which is not present in the PR description and is an absolute statement that could be misleading in the plugin catalog. Consider removing it or rephrasing it to a verifiable, specific statement (e.g., naming the OCR engine(s) included).