Translate remaining Greek lesson H1 titles in PR #243

[Copilot]

This updates the six remaining Greek translation lesson titles whose level-1 headings were still partially or fully in English, aligning the files with the PR’s stated “all headings translated into Greek” convention. Each title now uses the Greek term first and preserves the English glossary term in parentheses.

• Scope

  • Updates only line 1 in these files:
    • lessons/03-prompt-engineering/translations/README.el.md
    • lessons/04-structured-output/translations/README.el.md
    • lessons/05-rag/translations/README.el.md
    • lessons/06-tool-calling/translations/README.el.md
    • lessons/07-mcp/translations/README.el.md
    • lessons/08-mcp-advanced/translations/README.el.md

• Title translation changes

  • Prompt Engineering → Μηχανική οδηγιών (Prompt Engineering)
  • Structured Output → Δομημένη έξοδος (Structured Output)
  • Retrieval-Augmented Generation (RAG) → Ανάκτηση-Ενισχυμένη Γενέαση (Retrieval-Augmented Generation, RAG)
  • Tool Calling → Κλήση εργαλείων (Tool Calling)
  • MCP, Model Context Protocol → Πρωτόκολλο Πλαισίου Μοντέλου (Model Context Protocol, MCP)
  • MCP Clients / Large Language Models → πελάτες MCP (Clients) / Μεγάλα Γλωσσικά Μοντέλα (Large Language Models)

• Anchor compatibility

  • No additional anchor preservation changes were needed; the existing in-page jump links in these documents target section anchors, not the H1 title anchors.

-# Μάθημα 7: MCP, Model Context Protocol
+# Μάθημα 7: Πρωτόκολλο Πλαισίου Μοντέλου (Model Context Protocol, MCP)

[Copilot]

Pull request overview

This PR updates the remaining Greek translation lesson H1 titles so they’re fully translated into Greek while preserving the original English glossary terms in parentheses, aligning the Greek lesson READMEs with the repository’s translation convention.

Changes:

• Translated the remaining partially-English H1 lesson titles into Greek across lessons 3–8.
• Preserved key English glossary terms in parentheses (e.g., “Prompt Engineering”, “Structured Output”, “Tool Calling”, “Model Context Protocol, MCP”).
• Updated Lesson 8’s H1 to translate “MCP Clients” and “Large Language Models” with parenthetical English terms.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
lessons/03-prompt-engineering/translations/README.el.md	Translates the Lesson 3 H1 title and retains “Prompt Engineering” in parentheses.
lessons/04-structured-output/translations/README.el.md	Translates the Lesson 4 H1 title and retains “Structured Output” in parentheses.
lessons/05-rag/translations/README.el.md	Translates the Lesson 5 H1 title; includes Greek term for RAG concept plus English term in parentheses.
lessons/06-tool-calling/translations/README.el.md	Translates the Lesson 6 H1 title and retains “Tool Calling” in parentheses.
lessons/07-mcp/translations/README.el.md	Translates the Lesson 7 H1 title and retains “Model Context Protocol, MCP” in parentheses.
lessons/08-mcp-advanced/translations/README.el.md	Translates the Lesson 8 H1 title, translating “MCP Clients” and “Large Language Models” while retaining English terms in parentheses.

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