chore: follow the latest TypeScript repository template

[angeloashmore]

Resolves:

Description

Aligns the repository with prismicio/prismic-typescript-template. Stacked on top of #271.

• Node.js 26 in CI, and added to the e2e matrix. chore(deps): update dependencies #271 already dropped Node.js 20 and set engines.node to >=22, because the updated toolchain requires it.
• actions/checkout@v7, actions/setup-node@v7, googleapis/release-please-action@v5.
• The types matrix becomes TypeScript 5, 6, and 7.
• .gitignore follows the template's ordering.

Left alone on purpose: the e2e job runs Playwright instead of the template's unit job, and tsconfig.json and .oxlintrc.json keep their React-specific settings.

Checklist

• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

Preview

How to QA ¹

🤖 Generated with Claude Code

https://claude.ai/code/session_0188j8bZtppjZzgiM5snmz6k

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Note

Medium Risk
Raises minimum Node to 22 and bumps TypeScript/build tooling, which can break consumers on older Node or type-check setups; small runtime behavior fixes in image params and toolbar callbacks are low blast radius but worth a quick preview/e2e pass.

Overview
Brings the repo in line with the Prismic TypeScript template: Node 26 in publish/validate (and e2e matrix 22 / 24 / 26), engines.node raised to >=22, GitHub Actions bumped to checkout/setup-node v7 and release-please v5, and the types CI matrix simplified to TypeScript 5, 6, and 7.

Dev toolchain and e2e move to TypeScript 7, tsdown 0.23, newer Playwright/oxlint/oxfmt, React 19.3, and refreshed Next/Prismic client versions in the Next e2e workspace (lockfile regenerated).

Library fixes: PrismicImage clones imgixParams before normalizing nulls so callers are not mutated; PrismicToolbar syncs preview callback refs in useEffect instead of on every render. Playwright env typing treats CI as string.

.gitignore reorders the *.tgz entry to match the template.

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