Replace the old stat-parser logic with a new declare-parser to handle
variable declarations and tag modifiers. This includes moving the
declare-parser logic to a shared location in cli/completions to avoid
duplication between the CLI and the journal component.
Add support for `role=declare` blocks in markdown to allow for
dynamic variable declarations and tag-based modifiers.
- Implement `declare-parser` to parse CSV-formatted declaration blocks.
- Implement `var-reactivity` to manage dependency graphs, topological
sorting, and cascading updates when variables change.
- Implement `variable-expression` to evaluate arithmetic, dice rolls,
and math functions within expressions.
hypercross