[codex] Polish README demo positioning

[RtlZeroMemory]

Summary

• Add the command-console GIF asset to the root README.
• Tighten the README positioning around deterministic native-backed terminal applications.
• Add a short "Why Rezi" section, clarify Starship as the larger showcase template, and document feature maturity expectations.
• Note in the Starship template README that it is intentionally larger than the default starters.

Validation

• npm run typecheck
• npm run check:create-rezi-templates

Summary by CodeRabbit

• Documentation
  • Updated README with clearer product positioning and expanded overview content.
  • Added new informational sections highlighting key features and demo showcase.
  • Improved template guidance to help users select the right starter based on size and complexity.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 7d55708e-c22a-4df0-b49e-2e2dbc237654

📥 Commits

Reviewing files that changed from the base of the PR and between a189aa7 and 83e23d0.

⛔ Files ignored due to path filters (1)

• assets/REZICONSOLE3.gif is excluded by !**/*.gif

📒 Files selected for processing (2)

• README.md
• packages/create-rezi/templates/starship/README.md

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📝 Walkthrough

Walkthrough

Documentation updates to the root README repositioning language from "deterministic" to "predictable", adding new sections (Why Rezi, Starship Demo, Feature Maturity) and a command-console demo image. Starship template README clarifies the template's larger size and directs users to smaller alternatives.

Changes

Cohort / File(s)	Summary
Root Documentation README.md	Reframes positioning language, adds "Why Rezi", "Starship Demo", and "Feature Maturity" sections, includes command-console demo image, and expands starship template description with routing, charts, canvas, forms, and overlays.
Starship Template Documentation packages/create-rezi/templates/starship/README.md	Adds clarification that starship is a larger template with guidance to use minimal or cli-tool for smaller alternatives.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• docs: refresh README overview #391: Modifies root README positioning and language adjustments regarding deterministic/predictable input-rendering behavior and overview structure.

Poem

🐰 A rabbit hops through docs so fine,
Where "predictable" now takes the line,
With starship guides and features bright,
The README shines with clearer light! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch polish-starship-demo

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