Overhaul animation queues so the queue is stored as a single encoded string.

luprex/cpp/core/streambuffer.hpp

@@ -304,6 +304,11 @@ public:
     //
     void read_bytes_into(char *target, int64_t len);
     
+    // Read a string as a string_view.
+    //
+    std::string_view read_string_view_limit(uint64_t limit);
+    std::string_view read_string_view() { return read_string_view_limit(0x1000000); }
+
     // Read and write larger types.
     //
     // Throws StreamEof if the specified number of bytes aren't present.
@@ -385,7 +390,7 @@ public:
     // This is always false, because this module throws exceptions
     // when reading beyond EOF.
     bool read_beyond_eof() { return false; }
-    
+
 private:
     // Start and end of the allocated block.
     char *buf_lo_;