Handle 'interactiveRequested' event on embeddable page

[#71314512]
Add script that automatically sets 'lang' and 'i18nMetadata' properties

[#71314512]

and generates metadata file in case of need.
Add i18n metadata files

[#71314512]
Set "lang" and "i18nMetadata" properties in translated interactives

[#71314512]
Make embeddable page compatible with production version of Lab

[#71314512]

Without this fix an error would be thrown.
Add i18n branch config file
Fix i18n config
Remove references to unfinished Norwegian translations

[#71314512]
Add Polish translation of "Oil and Water"

We have complete Polish translation of Lab too, so it's a nice example.
And information to the readme about interactive translation patterns

[#71327488]
Merge branch 'i18n'

Conflicts:
	src/locales/nn/interactives/sam/DNA-to-proteins/3-modeling-translation.json
	src/locales/nn/interactives/sam/chemical-reactions/6-catalysis.json
	src/locales/nn/interactives/sam/chemical-reactions/7-polymers-monomers.json
	src/locales/nn/interactives/sam/diffusion/1-dropping-dye-on-click.json
	src/locales/nn/interactives/sam/diffusion/2-temperature.json
	src/locales/nn/interactives/sam/diffusion/3-mass.json
	src/locales/nn/interactives/sam/diffusion/4-2-semipermeable-two-barrier.json
	src/locales/nn/interactives/sam/diffusion/4-semipermeable.json
	src/locales/nn/interactives/sam/diffusion/5-permeable-membrane.json
	src/locales/nn/interactives/sam/phase-change/2-two-types-of-gases.json
	src/locales/nn/interactives/sam/phase-change/3-liquids.json
	src/locales/nn/interactives/sam/phase-change/4-solids.json
	src/locales/nn/interactives/samples/5-amino-acids.json