📝 docs: the Photon engine page reads in Spanish, French and German
Closes the nine anchors that Capabilities and Components aimed into this page in
each language: they carried the English slugs while the page did not exist, so
they resolved to nothing. Two broken anchors are left in the whole wiki, both of
them older than this work: Upgrading points at Architecture#server-actions, in
English and in Portuguese, and that heading is not there.
✨ feat: the wiki reads in five languages
Spanish, French and German join English and Portuguese: 25 of the 39 pages
translated, each language with its own `_Sidebar.md` under `locale/<culture>/`,
which is the file GitHub resolves beside a page and the site reads as that
language's navigation.
The language switch on every page lists only the languages whose file EXISTS,
so a page with no Spanish yet offers the four that are there and never a dead
link. It is generated rather than written, so each tranche of translations
lights its own entries and nothing has to be remembered.
Version marks carry over verbatim: the `eq:since` comment is byte-identical
across languages and only the italic word changes (Since / Desde / Depuis /
Seit). Production reads the comment and never the word, so the runtime is
language-agnostic; the one place that knew the words was the site's own guard.
Still to translate, the fourteen longest: BuildFlow, Capabilities, CodeEditor,
Compiler, Debug, DesignSystem, Diagnostics, Icons, Photon, ServerEvents,
ServerIntegration, SupportedFeatures, Upgrading, VisualEditor.
Also drops 150 em-dashes from the English pages and 134 from the Portuguese
ones, on the pages this commit touches.