The documentation incorrectly described Wren fields as "protected" when they are actually "private". Updated the encapsulation section to accurately reflect that fields can only be accessed within the defining class, not by subclasses. This fixes issue #237.
- Compile empty `()` as a valid method signature distinct from no parentheses
- Update `call()`, `clear()`, `run()`, `try()`, and `yield()` to use empty argument lists
- Revise documentation across multiple files to reflect new signature semantics
The diff fixes a single spelling error in doc/site/classes.markdown, changing the misspelled word "clreate" to the correct "create" in the sentence warning against inheriting from built-in types.
Add a warning to the classes documentation page explaining that users should not create classes inheriting from built-in types (Bool, Num, String, Range, List) due to internal bit representation conflicts that cause confusion when invoking inherited methods on derived types.
Implement a new `Fiber.try()` method that allows a calling fiber to catch runtime errors from a called fiber. When a fiber is invoked with `try()` instead of `call()`, any runtime error that occurs in the called fiber is returned as a string to the caller rather than terminating the program with a stack trace. The `callerIsTrying` flag on `ObjFiber` tracks this state, and the `runtimeError` function now checks this flag to redirect the error to the caller's stack. Also adds `Fiber.error` getter to retrieve the error string from a failed fiber, changes `Fiber.isDone` to return `true` for errored fibers, and migrates the fiber error field from a raw `char*` to an `ObjString*` for proper memory management. Includes comprehensive test cases for try behavior, re-entry prevention, and error state queries.
Add `^category` front matter to all language, types, and reference doc pages for site navigation restructuring. Replace `:::wren` and `:::java` code block annotations with `:::dart` across multiple files. Create new stub pages for core-libraries, embedding-api, and contributing under the reference category. Remove the old embedding and getting-involved stub pages.
Add two TODO comments to `doc/site/classes.markdown` noting the need to document static methods and to refactor the relationship between method-calls and classes documentation. Also add a matching TODO to `doc/site/method-calls.markdown` to coordinate the refactoring of both pages into using and creating classes.
Add full introductory content to the classes documentation page covering class definition, inheritance, and the Object superclass. Create a new usage documentation page with a TODO placeholder. Update the HTML page title format from "wren {title}" to "Wren - {title}" and add a navigation link to the new usage page.
