Feature/ai strategy update

[martyn-fewtrell]

This pull request renames and updates the AI strategy document to broaden its scope from "Software Engineering" to "Engineering" as a whole. The changes involve updating terminology throughout the document, clarifying training resources, and generalizing the applicability of the strategy.

Key updates include:

Scope and Terminology Updates:

• Renamed the file from software-engineering/strategy/software-engineering-ai-strategy.md to engineering/strategy/engineering-ai-strategy.md and updated all references from "Software Engineering" to "Engineering" to reflect a broader application of the AI strategy. [1] [2] [3] [4] [5] [6]

Training and Onboarding Enhancements:

• Clarified that new starters can use both PluralSight and Microsoft Learn for Approved Assistant training, specifically referencing the "Added more detail on TSR process, esp. around when TSRs are required #300 GitHub Copilot" course.

Process and Roadmap Adjustments:

• Removed specific year references from the implementation roadmap phases to generalize the timeline and make it more adaptable. [1] [2]

Leadership Approval:

• Updated the approval line to be from the "Head of Engineering" instead of "Head of Software Engineering".

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