feat: add ESLint configuration and update dependencies

- Introduced a new ESLint configuration file to enforce coding standards.
- Updated various package dependencies to their latest versions, including Qwik and TypeScript-related packages.
- Enhanced .gitignore to include pnpm store and ensure cleaner builds.
- Added documentation for Qwik core development practices and patterns.
- Refactored components to utilize new icon imports and improved state management in the Devtools UI.

Author: JerryWu1234

.changeset/fifty-lemons-like.md

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+---
+'@qwik.dev/devtools': patch
+---
+
+feat: add ESLint configuration and update dependencies