init: scripts diversos (crawlers, conversores, scrapers)

pdf-extractor/README.md

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+# pdf-extractor - PDF to Markdown with AI
+
+Extrai texto de PDFs e converte para Markdown usando AI (OpenRouter/Mistral).
+
+## Setup
+```bash
+python3 -m venv venv
+source venv/bin/activate
+pip install -r requirements.txt
+cp .env.example .env
+# Editar .env com API key OpenRouter
+```
+
+## Uso
+```bash
+# Colocar PDFs na pasta input/
+mkdir -p input output
+cp meu-ficheiro.pdf input/
+python pdfmd.py
+# Output em output/
+```
+
+## Configuracao
+`.env`:
+- `OPENROUTER_API_KEY` - Chave API OpenRouter (obrigatorio)