refactor: prepare includes

[ilandikov]

Types of changes

Done by pairing with @claremacrae.

Internal changes:

• Refactor (prefix: refactor - non-breaking change which only improves the design or structure of existing code, and making no changes to its external behaviour)
• Tests (prefix: test - additions and improvements to unit tests and the smoke tests)

Description

• add first version of reusable instructions, not yet ready for public use

Motivation and Context

• prepare to introduce includes
• Global macro definitions for task block statements #2443
• Support centrally defined filter subsets that can be referenced from task blocks #2267

How has this been tested?

• unit tests
• exploratory testing

Checklist

• My code follows the code style of this project and passes yarn run lint.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• My change has adequate Unit Test coverage.

Terms

• My contribution follows this project's contributing guide
• I agree to follow this project's Code of Conduct

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud