Replace :done with :state in task

[strika]

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[Copilot]

Pull request overview

This PR refactors the task representation by replacing the boolean :done field with a more explicit :state field that uses keyword values (:open, :checked). This change improves code clarity by making task states more explicit and maintainable.

Key changes:

• Replaced boolean :done field with keyword-based :state field supporting :open and :checked states
• Updated task builder functions to use the new state system
• Modified parser and serializer logic to handle state keywords instead of boolean values

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/task.janet	Updated task builder functions to use :state field with keyword values instead of :done boolean
src/plan/parser.janet	Modified parser to generate :state with :checked/:open keywords from checkbox syntax
src/plan/serializer.janet	Updated serializer to convert :state keywords back to checkbox syntax
src/plan.janet	Refactored completed-tasks and pending-tasks filters to check :state equality
test/task_test.janet	Added comprehensive tests for new task builder functions and updated existing tests
test/schedule_parser_test.janet	Updated test assertions to check :state field
test/plan/serializer_test.janet	Updated test data to use :state keywords
test/plan/parser_test.janet	Updated test assertions to verify :state values
test/examples/todo.md	Changed task checkboxes from checked to unchecked
test/commands/schedule_tasks_test.janet	Updated test assertions to check :state field
test/commands/schedule_contacts_test.janet	Updated test assertions to check :state field

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[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated no new comments.

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