docs: Blog post introducing the Text Editor and IntelliSense features #480

Description

Write and publish a blog post on open-workflow-specification.org/blog introducing the new Text Editor and its IntelliSense capabilities:

• Introduce the Text Editor and its purpose.
• Showcase JSON/YAML IntelliSense capabilities, including completions, CodeLens and diagnostics (schema-driven and specification-driven).
• Publish the post under the "Editor" blog section, consistently with Blog Post: Embedding the Diagram Editor into Quarkus Dev UI #479.

Motivation

Showcase the Text Editor's schema-aware editing experience and demonstrate how IntelliSense helps users write and validate Open Workflow definitions.

Definition of Done

• Documentation: Blog post published on the Open Workflow Specification website.