Add format() method to Formatter class to delegate to the style's
format method. Change Placeholder.loggers to public so Manager can
access it for hierarchy fixup.
Fix dateformat and style variables reading from wrong option fields
(filemode instead of datefmt/style). Restructure control flow to
match CPython logic: early return when handlers exist and force is
not set, proper mutual exclusion of stream/filename/handlers args.
Remove unreachable code block.
Fix isEnabledFor() to correctly cache and return level check results
instead of always caching false. Fix _log() to call handle() after
creating the LogRecord. Fix makeRecord() to use Object.keys() and
template literal. Add manager getter and fix setter to actually
assign the value.
Add missing getter for formatter property. Fix format() to return
the formatted string instead of discarding it. Fix level setter
to assign to _level instead of recursing infinitely.
Fix inverted type check in getLogger() and add missing return
statement. Implement _fixupParents() and _fixupChildren() to
establish parent-child logger relationships based on dot-separated
scope names.
Well this started a little messy and I didn't really stick to atomicity. This
was the first script I've written, which was later transferred to the index.
It's the same code just with less structure and some funcitionality missing...
