feat(field): table formula buttons, block placeholders, attribute fields on insert, plot-time field stamping

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

locales/ru-RU/opencadstudio.ftl

@@ -4094,6 +4094,12 @@ insert =
     .field-select-object = Select object
     .field-expression = Field expression
     .field-help = Inserts a field: text that updates from the drawing, the date or another source.
+    .field-average = Average
+    .field-sum = Sum
+    .field-object-name = Object name
+    .field-block-placeholder = Block placeholder
+    .field-block-editor-only = Only accessible in the block editor
+    .field-block-reference-property = Block reference property
     .field-cat-linked = Linked
     .field-current-precision = Current precision
     .field-evaluate = Evaluate