Ref/bundle size reporting

[Lissy93]

• Implements bundle size reporting during compilation process on github actions
• Adds test reporting to codecov in the test workflow
• Adds codecov.yml config file for coverage test settings

This pull request introduces Codecov integration to the project, enabling automated reporting of test results and code coverage for unit, API, and end-to-end tests. The changes ensure that Codecov uploads are only attempted when a token is present, and provide configuration for coverage thresholds, flags, and component management. Additionally, dependencies and build configuration are updated to support this integration.

Codecov Integration and Configuration:

• Added a comprehensive codecov.yaml configuration file to set coverage thresholds, manage components, ignore files, and configure reporting behavior.
• Updated .github/workflows/tests.yml to upload test results and coverage reports to Codecov for unit, API, and e2e tests, gated on the presence of a Codecov token. [1] [2] [3] [4] [5] [6]

Build and Dependency Updates:

• Added @codecov/rollup-plugin and @types/node to devDependencies in package.json to support Codecov integration and improve type support. [1] [2]
• Updated vite.config.ts to include the Codecov Rollup plugin, enabling bundle analysis and upload when the token is present.

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