Validate ordered Age writing and highlight Binder errors (#30)

src/main/resources/assets/rivencraft/lang/en_us.json

@@ -34,6 +34,16 @@
   "screen.rivencraft.book_binder.previous_pages": "Scroll pages left (Left Arrow)",
   "screen.rivencraft.book_binder.next_pages": "Scroll pages right (Right Arrow)",
   "screen.rivencraft.book_binder.select_hint": "Right-click page to select",
+  "screen.rivencraft.book_binder.grammar.too_many": "Too many pages for a new Age; remove excess pages",
+  "screen.rivencraft.book_binder.grammar.missing_panel": "Add a Link Panel as the first page",
+  "screen.rivencraft.book_binder.grammar.panel_order": "Page %s: move the Link Panel to the first position",
+  "screen.rivencraft.book_binder.grammar.duplicate_panel": "Page %s: remove the extra Link Panel",
+  "screen.rivencraft.book_binder.grammar.unresolved": "Page %s: missing symbol definition; restore its data pack or remove it",
+  "screen.rivencraft.book_binder.grammar.unsupported": "Page %s: this symbol needs semantic schema v2; update its data pack or remove it",
+  "screen.rivencraft.book_binder.grammar.duplicate": "Page %s: remove the duplicate symbol",
+  "screen.rivencraft.book_binder.grammar.conflict": "Page %s: replace the conflicting symbol",
+  "screen.rivencraft.book_binder.grammar.out_of_order": "Page %s: move this symbol before later categories",
+  "screen.rivencraft.book_binder.grammar.misplaced_modifier": "Page %s: move this modifier before its celestial page",
   "screen.rivencraft.writing_desk.ink": "Ink: %s/%s",
   "screen.rivencraft.writing_desk.search": "Search",
   "screen.rivencraft.writing_desk.sort": "Sort pages by name (A–Z)",
@@ -58,6 +68,7 @@
   "message.rivencraft.descriptive_book.unwritten": "This Descriptive Book is unwritten",
   "message.rivencraft.descriptive_book.created": "Created Age: %s",
   "message.rivencraft.descriptive_book.unavailable": "That Age is unavailable",
+  "message.rivencraft.descriptive_book.invalid_writing": "Writing cannot create an Age: %s",
   "message.rivencraft.descriptive_book.unsafe": "No safe destination was found in that Age",
   "message.rivencraft.descriptive_book.linked_first": "Linked to %s — a Return Link was created",
   "message.rivencraft.descriptive_book.linked": "Linked to %s",