battle scripts are almost identical to pokescripts in how they work. Each command has a single-byte code, followed by some number of arguments, each of which are 1 to 4 bytes.
Because of these similarities, we can reuse the same engine code and just load the engine from another file. So the code tool can have a 4th mode and basically just work for free. Runs for battle scripts can be as simple as XSE runs: just a single byte, don't bothe decoding, show decoding only in the tool.
Still to add: how to know which battle script commands are ending commands, or which ones point to other battle scripts, or which ones point to strings. How to view battle scripts in the editor? Etc.
