Revert translation cleanup; add only show_toggle_switches key

[Copilot]

The previous commit over-scoped translation changes by reformatting, reordering, and backfilling missing keys across all language files. Only the new show_toggle_switches key should be added.

Changes

• Restored all 25 non-English translation files to their exact upstream state, preserving original line endings (CRLF/LF per file)
• Added show_toggle_switches only to the 14 language files that already contain the parent card_editor.fields structure (i.e., have show_header_toggle): bg, el, en, es, fi, he, lv, nl, pl, sk, sl, sv, ur, zh-Hans
• Left untouched the 12 partial translations lacking show_header_toggle — these fall back to English for the new key

The resulting translation diff is 14 files × 4 lines each:

"show_toggle_switches": {
  "heading": "Show toggle switches",
  "description": "Show toggle switch for each individual schedule in the card"
},

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