com.wallstop-studios.unity-helpers/pr-description.md

Treasure chest of Unity developer tools

## Description

This PR prepares the next package release and refreshes user-facing project metadata.

- Bumps package version to `3.3.0` in `package.json`
- Adds `3.3.0` to issue template version dropdowns
- Adds a `3.3.0` release section header in `CHANGELOG.md`
- Updates the docs banner SVG and tagline for the project site

## Related Issue

Fixes #

## Type of Change

- [ ] Bug fix (non-breaking change that fixes an issue)
- [ ] New feature (non-breaking change that adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)
- [x] Documentation update
- [x] Refactor (code change that neither fixes a bug nor adds a feature)

## Checklist

- [ ] I have added tests that prove my fix is effective or my feature works
- [x] I have updated the documentation accordingly
- [x] I have updated the [CHANGELOG](./CHANGELOG.md)
- [x] My changes do not introduce breaking changes, or breaking changes are documented