Modernize React TypeScript template

[scobo]

• Updates dependency versions.
• Converts all files to TypeScript.
• Modernizes use of React 19 hooks.
• Implements the React Compiler for automatic memoization.
• Improves ESLint configuration and addresses all lint issues.
• Adds Stylelint for CSS formatting and addresses all issues.
• Creates # path alias for src to avoid relative path imports.
• Replaces .editorconfig with Prettier for code formatting.
• Uses CSS modules for typed class names with locally-scoped namespaces.
• Adds Husky and lint-staged for automatic checking and fixing of formatting and lint issues.
• Adds __DEV__ global for gating development-only code.
• Updates log.ts to report the template type instead of the package name, as the README.md indicates it should.
• Optimizes images.

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Note

Medium Risk
Mostly tooling/configuration and documentation changes, but it alters the developer workflow (new Husky/lint-staged hooks, ESLint strict type-checked config, Stylelint/Prettier) and build scripts/logging, which can break local CI/builds if misconfigured.

Overview
Modernizes the template’s tooling and contributor workflow by replacing legacy configs (.eslintrc.cjs, .editorconfig) with ESLint flat config (eslint.config.ts), Prettier, and Stylelint, plus new Husky pre-commit/pre-push hooks and lint-staged-driven auto-fixing.

Updates project metadata/docs (README.md, index.html), tweaks repo hygiene (.gitignore, .npmrc, .nvmrc), and migrates the anonymous build logger from log.js to TypeScript (scripts/log.ts) with an updated reporting path.

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