Fix broken anchors, untranslated headings, and remove out-of-scope proposal file (Greek translations PR #243 follow-up)

[Copilot]

10 suppressed comments from the latest Copilot review on PR microsoft#243 addressed: broken in-page anchor jump-links across 7 Greek translation files, 2 untranslated headings in lessons 04 and 06, and an out-of-scope proposal file.

Broken anchor jump-links (7 files)

Translating ## Interact with … headings into Greek broke auto-generated anchors that in-page jump links (#interact-with-*) relied on. Added explicit HTML anchors immediately before each heading, matching the pattern already established in lessons/01-intro-to-genai/translations/README.el.md:

<a id="interact-with-leonardo"></a>
## Αλληλεπίδρασε με τον Leonardo

Applied to lessons 02–08 (leonardo, sforza, montezuma, ada-lovelace, amelia-earhart, scipio, hedy-lamarr).

Untranslated headings (2 files)

• lessons/04-structured-output: ## Structured Output → ## Δομημένη έξοδος (Structured Output)
• lessons/06-tool-calling: ## Tool calling → ## Κλήση εργαλείων (Tool calling)

Removed out-of-scope file

Deleted docs/proposals/new-lesson-ai-agents.md — a Lesson 09 proposal that was outside the stated scope of this PR (Greek translations only).

[Copilot]

Pull request overview

This PR follows up on Greek translation PR microsoft#243 by repairing in-page navigation and finishing a couple of partially untranslated section headings, while also removing an unrelated proposal document to keep the translation scope clean.

Changes:

• Restored broken #interact-with-* jump links in Greek lesson translations by adding explicit HTML anchors immediately before the corresponding “Interact with …” headings (lessons 02–08).
• Translated two remaining English headings in lessons 04 and 06 while keeping the original English term in parentheses.
• Removed an out-of-scope Lesson 09 proposal markdown file from docs/proposals/.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
lessons/02-first-ai-app/translations/README.el.md	Adds an explicit interact-with-leonardo anchor to keep the existing in-page jump link working.
lessons/03-prompt-engineering/translations/README.el.md	Adds an explicit interact-with-sforza anchor to restore in-page navigation.
lessons/04-structured-output/translations/README.el.md	Adds an explicit interact-with-montezuma anchor and translates the “Structured Output” heading.
lessons/05-rag/translations/README.el.md	Adds an explicit interact-with-ada-lovelace anchor to restore in-page navigation.
lessons/06-tool-calling/translations/README.el.md	Adds an explicit interact-with-amelia-earhart anchor and translates the “Tool calling” heading.
lessons/07-mcp/translations/README.el.md	Adds an explicit interact-with-scipio anchor to restore in-page navigation.
lessons/08-mcp-advanced/translations/README.el.md	Adds an explicit interact-with-hedy-lamarr anchor to restore in-page navigation.
docs/proposals/new-lesson-ai-agents.md	Removes an out-of-scope proposal file to keep the PR focused on Greek translations.

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