* Add 'default' slot option + implicit fills; tests; docs
* Differentiate between standard fillnodes and implicitfillnodes on type lvl
* Reworking slot-fill rendering logic. Simplifying component interfact. Add new get_string_template method
* First working implementation of chainmap instead of stacks for slot resolution
* Stop passing FillNode to Component initalizer -> better decoupling
* Treat fill name and alias and component name as filterexpression, dropping namedvariable
* Name arg of if_filled tags and slots must be string literal
* Introduce safer_staticfiles app to ignore .py,.html as security measure. Docs up-to-date
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
