docs: fundamentals section

[hejsztynx]

Summary

First section of the docs - Fundamentals

Added a react-native-web plugin, to allow interactive examples

Configured ESLint, so it checks the files in the docs - we want to keep the code of interactive examples clean

[Copilot]

Pull request overview

Adds the initial “Fundamentals” documentation section for React Native Enriched HTML and introduces an interactive, in-browser example system for the docs site by wiring React Native components to react-native-web.

Changes:

• Added new Fundamentals pages (Getting started, Core concepts, HTML tags reference, and “Your first editor” walkthrough).
• Introduced an InteractiveExample component (preview/code tabs + reset) and a first runnable example (FirstEditor.tsx).
• Updated the docs build to support interactive RN examples via a react-native-web webpack alias, plus added required dependencies/loaders.

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
docs/yarn.lock	Updates lockfile for new docs dependencies (react-native(-web), raw-loader, etc.).
docs/src/theme/MDXComponents.js	Registers InteractiveExample as an available MDX component.
docs/src/examples/FirstEditor.tsx	Adds the first runnable interactive example used in Fundamentals docs.
docs/src/components/InteractiveExample/styles.module.css	Styles for the interactive example container, tabs, and preview/code layout.
docs/src/components/InteractiveExample/index.tsx	Implements interactive example preview/code tabs with a reset mechanism.
docs/package.json	Adds dependencies needed to render RN examples in the docs site and raw source loading.
docs/docusaurus.config.js	Adds a small plugin to alias react-native to react-native-web for the docs webpack build.
docs/docs/fundamentals/your-first-editor.mdx	New “Your first editor” page including a live interactive example embed.
docs/docs/fundamentals/your-first-editor.md	Removes the old placeholder page in favor of the new MDX version.
docs/docs/fundamentals/html-format-and-supported-tags.md	Fills in the supported-tags reference content and conflict/blocking rules.
docs/docs/fundamentals/getting-started.md	Replaces placeholder with Getting Started content (installation, prerequisites, etc.).
docs/docs/fundamentals/core-concepts.md	Replaces placeholder with Core Concepts content (uncontrolled model, HTML source of truth, etc.).

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[kacperzolkiewski]

Why not the newest version of RN?

[hejsztynx]

I also bumped react-native-enriched-html

[kacperzolkiewski]

react and react-dom should be at least 19.2.3 when we are using react-native: 0.86: https://react-native-community.github.io/upgrade-helper/?from=0.83.0&to=0.86.0

But now I'm wondering whether we should touch those dependencies at all, especially if this setup was generated by the marketing team. We could simply use React Native 0.82, which is compatible with React 19.1.1, and leave the rest of the dependencies as they are.

[kacperzolkiewski]

@szydlovsky @exploIF some thoughts?

[exploIF]

Why it's needed? react-native-enriched-html web should work without react-native-web dependency