v1.7.0

1. Introduce linters for box::use statements:
   • box_universal_import_linter checks if all imports are explicit.
   • box_trailing_commas_linter checks if statements include trailing commas.
   • box_func_import_count_linter checks if the number of function imports does not exceed the limit.
   • box_separate_calls_linter checks if packages and modules are imported in separate statements.
2. Major refactor of rhino::app():
   • The request parameter is now correctly forwarded to the UI function
     when using a legacy_entrypoint (#395).
   • Force evaluation of arguments in higher-order functions
     to avoid unexpected behavior due to lazy evaluation (internal).
3. Add support for shiny.autoreload.