Refactor, package and document how to create blocks from fields.

[mark-friedman]

No description provided.

[Copilot]

PR Overview

This PR refactors and packages parts of the lexical variable plugin while adding documentation on creating blocks from fields (BYOB). Key changes include:

• New documentation explaining how to build custom blocks using the lexical variable fields and mixins
• Introduction of the simple_local_declaration_statement block and refactored variable getter/setter implementations
• Updates to generator functions, tests, and mixins for consistent naming and improved modularity

Reviewed Changes

File	Description
block-lexical-variables/README.md	Expanded documentation for BYOB (build your own blocks) and improved section organization
block-lexical-variables/src/blocks/variable-get-set.js	New block implementations and refactored variable renaming logic
block-lexical-variables/src/mixins.js	Added and refined mixin functions for contextual lexical variable scope handling
block-lexical-variables/tests/mocha/field_lexical_var.js	Updated tests to use getDeclaredVars in place of the deprecated getVars method
block-lexical-variables/src/generators/*	Updated generator functions to use the new forBlock API and use Order constants consistently
Others	Adjustments in various files (UNITTESTING.md, blocks.js, etc.) to integrate the changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

block-lexical-variables/tests/mocha/field_lexical_var.js:1271

• The test helper now uses getDeclaredVars instead of getVars, which is consistent with refactored naming; please confirm that all tests and references are updated accordingly.

return this.workspace.getBlockById(id).getDeclaredVars()[0];