Improvements

[timea-solid]

This is work done to improve different aspects of the library:

* better and state of the art configs
* version info
* clean dependencies
* consolidated tests

[Copilot]

Pull Request Overview

This PR implements comprehensive improvements to the solid-panes library focused on modernizing the build configuration, cleaning up dependencies, and consolidating test infrastructure. The changes represent a significant upgrade to project tooling and code standards.

• Modernized build system using TypeScript compiler directly instead of Babel
• Updated ESLint configuration to use neostandard and improved TypeScript support
• Consolidated test setup and improved test infrastructure with centralized configuration

Reviewed Changes

Copilot reviewed 36 out of 74 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
webpack.config.js	Modernized to ES modules and improved output configuration
package.json	Updated build scripts, dependencies, and project configuration
eslint.config.mjs	Complete rewrite using neostandard with enhanced TypeScript rules
babel.config.js	Converted from .babelrc to ES module format
test/helpers/setup.ts	New centralized test setup replacing individual test file configurations
tsconfig.test.json	New TypeScript configuration specifically for tests
Multiple test files	Removed duplicate TextEncoder/TextDecoder setup and fixed import paths
Multiple source files	Code style improvements including quote consistency and object shorthand

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