decompiler: support animation export and support master art groups in build-actor tool (#4260)

Adds support for exporting animations for foreground models. It's not
perfect and doesn't handle the Jak 2/3 animations very well in some
cases (scale can often get messed up, especially for the LZO compressed
ones, I have no idea what is going on with the data in those art groups
sometimes, so that'll have to be revisited later...), but it does a
decent job on Jak 1.

Additionally, the `build-actor` tool has also been changed to support
setting the `master-art-group-name` and `master-art-group-index` fields
to allow for custom art groups to link their animations to a different
master art group, which lets you add custom animations to vanilla art
groups.

decompiler/level_extractor/extract_level.cpp

@@ -3,6 +3,8 @@
 #include <set>
 #include <thread>
 
+#include "extract_anim.h"
+
 #include "common/log/log.h"
 #include "common/util/FileUtil.h"
 #include "common/util/SimpleThreadGroup.h"
@@ -129,6 +131,7 @@ void extract_art_groups_from_level(const ObjectFileDB& db,
         extract_merc(ag_file, tex_db, db.dts, tex_remap, level_data, false, db.version(),
                      swapped_info);
         extract_joint_group(ag_file, db.dts, db.version(), art_group_data);
+        extract_animations(ag_file, db.dts, db.version(), art_group_data);
       }
     }
   }