High-level architectural overview for Elyra components

[lresende]

What changes were proposed in this pull request?

High-level architectural overview for Elyra components

Note: this is an OpenSSF requirement for achieving the silver badge

How was this pull request tested?

Developer's Certificate of Origin 1.1

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

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[amolahinge]

Should we consider drawing this diagram using mermaid? easy to maintain!

[Copilot]

Pull Request Overview

This PR adds comprehensive architectural documentation for Elyra as required for OpenSSF Silver badge certification. The documentation provides a detailed overview of Elyra's software architecture, components, and their relationships.

• Added a new architecture documentation file with detailed component descriptions
• Updated the documentation index to include the new architecture guide
• Provided comprehensive coverage of frontend, backend, storage, and external runtime integration

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
docs/source/index.rst	Added reference to new architecture documentation in Developer Guide section
docs/source/developer_guide/architecture.md	New comprehensive architectural documentation covering all major Elyra components and their relationships

Comments suppressed due to low confidence (1)

docs/source/index.rst:1

• [nitpick] The blank line at line 70 is inconsistent with the spacing pattern used elsewhere in the file. Consider removing this extra blank line to maintain consistent formatting throughout the document.

..

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[caponetto]

LGTM