CLI exporters omit v1.x blocks (chart/diagram/code/table) #66
Description
Problem
CLI renderers/exporters do not handle v1.x block types. HTML only covers table in addition to core blocks; Markdown/JSON ignore chart/diagram/code/table entirely. This causes data loss in exports.
Evidence
- omniscript-core/cli/src/renderers/html.ts: no cases for chart/diagram/code.
- omniscript-core/cli/src/renderers/markdown.ts: no chart/diagram/code/table handling.
- omniscript-core/cli/src/renderers/json.ts: no chart/diagram/code/table handling.
Expected
- Add render/export support for chart, diagram, code, and table blocks across HTML/Markdown/JSON.
- Keep outputs aligned with spec v1.2 and existing converter behavior.
- Add tests for each block type in CLI renderers.
Acceptance Criteria
- Exports include all v1.x blocks.
- Test coverage added for each new block type.
- No regressions in existing CLI tests.