docs: document supported versions

[javier-godoy]

Summary by CodeRabbit

• Documentation
  • Added "Supported versions" reference documenting compatibility between Vaadin releases and add-on versions.

[coderabbitai]

Walkthrough

A new "Supported versions" documentation section was added to the README with a table mapping Vaadin versions to corresponding add-on versions. This is a content-only update with no code modifications.

Changes

Cohort / File(s)	Summary
Documentation README.md	Added "Supported versions" section with a table mapping Vaadin versions (24-25 → add-on 5.x, 14-23 → add-on 3.x).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The pull request title accurately describes the main change: adding documentation for supported versions to the README.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch supported-versions

📝 Coding Plan

• Generate coding plan for human review comments

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[coderabbitai]

🧹 Nitpick comments (1)

README.md (1)

9-12: Optional: clarify whether add-on 4.x is intentionally not supported.

A short note below the table would prevent confusion for users upgrading across major versions.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@README.md` around lines 9 - 12, Add a short clarifying note below the
versions table in README.md stating whether add-on 4.x is intentionally
unsupported or what users on Vaadin versions that would map to 4.x should do
(e.g., upgrade path, compatibility info, or rationale). Reference the versions
table header ("Vaadin Version | Add-on Version") and the rows for "24-25 | 5.x"
and "14-23 | 3.x" when placing the note so readers understand why 4.x is
omitted.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@README.md`:
- Around line 9-12: Add a short clarifying note below the versions table in
README.md stating whether add-on 4.x is intentionally unsupported or what users
on Vaadin versions that would map to 4.x should do (e.g., upgrade path,
compatibility info, or rationale). Reference the versions table header ("Vaadin
Version | Add-on Version") and the rows for "24-25 | 5.x" and "14-23 | 3.x" when
placing the note so readers understand why 4.x is omitted.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: ad30a943-ccb0-442a-8628-818b876264bc

📥 Commits

Reviewing files that changed from the base of the PR and between 2d8a8ee and 6e197fe.

📒 Files selected for processing (1)

• README.md