Refactor/translatable content

[jliermann]

This pull request introduces several improvements focused on code reuse, maintainability, and test performance. The main changes include centralizing feature button configuration, refactoring tests for efficiency, and adjusting test parallelism for CI environments.

Centralization and Reuse:

• Introduced a new commonFeatures module to centralize configuration for commonly used feature buttons, reducing duplication and making it easier to update feature button properties across the documentation.
• Refactored multiple documentation files (00_intro.mdx, 00_data_guide.mdx, 00_smartlab.mdx, 00_lbe_intro.mdx) to use the new commonFeatures object for rendering FeatureButton components, ensuring consistency and simplifying future updates. [1] [2] [3] [4] [5] [6] [7] [8]

Testing Improvements:

• Refactored the Playwright visual regression test (visual-pages.spec.ts) to use synchronous file system methods (readFileSync, readdirSync) instead of asynchronous ones, simplifying the test code and improving reliability. [1] [2] [3] [4] [5]
• Changed the test structure to discover all routes up front and run visual regression tests in parallel using Playwright's test.describe.configure({ mode: "parallel" }), which speeds up test execution.

CI Performance:

• Updated the Playwright configuration to set the number of workers based on the environment: 2 workers for CI, 4 for local development, optimizing resource usage and test speed.

These changes collectively improve maintainability, consistency, and test performance across the codebase.