doc(tutorial): clean up minor typos/grammar issues in index

[with-heart]

This PR cleans up a few minor typos and grammar issues on the tutorial index page

Summary by CodeRabbit

• Documentation
  • Corrected grammar, wording, and capitalization across the tutorial for improved readability.
  • Clarified task descriptions and section intros to better explain content and steps.
  • Updated example outputs and code snippets (e.g., response text) to align with revised guidance.
  • Replaced ambiguous phrases with precise instructions for smoother onboarding.
  • Streamlined narrative flow and concept inventory without changing outcomes.

[coderabbitai]

Walkthrough

Documentation edits to the tutorial: grammar and wording corrections, clarified instructions, and updated example outputs (e.g., server response from "Hello World!" to "Hello Elysia!"). No API or exported entity changes.

Changes

Cohort / File(s)	Summary of Changes
Docs: Tutorial text and examples docs/tutorial/index.md	Grammar and wording fixes; clarified task descriptions; adjusted headings/capitalization; updated code examples to match text (e.g., response string change); minor narrative refinements without changing behavior.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I twitch my whiskers, hop through docs so bright,
Swapping words like carrots—crisp, just right.
“Hello Elysia!” now sings in cheerful tone,
Each comma tucked, each heading neatly sewn.
A tidy trail of edits in soft moonlight—
Thump-thump, approved, the tutorial’s set to delight! 🥕

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title succinctly describes the primary change by indicating that minor typos and grammar issues are being cleaned up in the tutorial index, aligning directly with the content changes made in the pull request.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between b6a67d1 and dec9659.

📒 Files selected for processing (1)

• docs/tutorial/index.md (3 hunks)

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[with-heart]

I wasn't sure exactly what was meant here, but I think this might be right?