Add basic scripting support.

- Fix certain bugs in ruby parser
- And a lot more cleanup/minor fixes.

include/internal/buffer/types/generic.h

@@ -14,8 +14,8 @@ struct HistoryItem {
 
 struct GenericBuffer : ShardBuffer {
   uint64_t base_version{0};
-  std::chrono::system_clock::time_point timestamp;
-  std::string action;
+  std::chrono::system_clock::time_point timestamp{std::chrono::system_clock::now()};
+  std::string action{"Created buffer."};
   std::filesystem::path save_path{};
   std::vector<HistoryItem> undo_stack;
   std::vector<HistoryItem> redo_stack;
@@ -24,6 +24,7 @@ struct GenericBuffer : ShardBuffer {
       : ShardBuffer(name, nullptr, nullptr, Kind::Generic) {}
   ~GenericBuffer();
 
+  void language(BEd &ctx, std::string name);
   void list_history(BEd &ctx);
   ReadonlyBuffer *get_history(uint64_t version);
   void snapshot(std::string action);