- Remove erroneous iterate() and iteratorValue() method docs from map.markdown
since Map does not expose those methods directly
- Fix remove(key) parameter formatting from [key] to `key` for consistency
- Correct File.read encoding description from "The encoding or decoding is done"
to "No encoding or decoding is done" to accurately reflect behavior
Restructure the documentation hierarchy to prepare for documenting additional built-in modules. Move all core library documentation from `doc/site/core/` to `doc/site/modules/core/`, rename `modules.markdown` to `modularity.markdown`, remove `^category` metadata lines from all affected pages, update cross-reference links to use relative paths under the new structure, and add a TODO placeholder to the Class class page.
Bob Nystrom