New dedicated page for community-contributed examples, starting with
Dutch solar feed-in compensation (saldering) patterns adapted from
GitHub Discussion #105 (OdynBrouwer). Includes input_number helpers
for country-specific tax rates, template sensors for feed-in with
and without saldering, smart export automation, and dashboard card.
German spot price share template as starting point. Norwegian/Swedish
sections as placeholders for future contributions.
YAML code blocks use collapsible details elements to keep the page
scannable. Page is framed generically to accommodate any type of
community example in the future (not just country-specific).
Added cross-reference from sensors.md Energy Price section and new
"Community" sidebar category.
Impact: Users (especially Netherlands) can find ready-to-adapt template
examples for country-specific price calculations using the energy_price
and tax attributes. Framework ready for additional community examples.