* add PyLoader class
* create global loader during app creation time and remove it when pyscript loading operations are done
* make the loader global and open/close when apps is starting. Also add concept of app config so users can set if they want to autoclose the loader of handle it themselves
* add pyconfig file
* auto add global config if there's no config set in the page
* export initializer type
* define type for config
* move initialization out of svelte file, into app config
* change runtimes from strings to objects
* fix typo
* add PyLoader class
* create global loader during app creation time and remove it when pyscript loading operations are done
* make the loader global and open/close when apps is starting. Also add concept of app config so users can set if they want to autoclose the loader of handle it themselves
* add pyconfig file
* auto add global config if there's no config set in the page
* remove changes to simple_clock example
* Add and run end-of-file-fixer
* Add and run trailing-whitespace
* Add and run check-yaml
* Add and run check-json
* Add and run pretty-format-yaml
* Fix comment indentation
1. Rename simple script into hello world
2. Rename simple script 2 into simple clock
3. Group demos into categories, starting with simple examples towards more complex ones
