This hooks up the glyph protocol glossary to the terminal state. This effectively makes us handle the APC protocol for it both in Ghostty GUI and libghostty, although we didn't implement the renderer yet. The Zig/C libghostty API also has a way to disable the protocol but it is enabled by default. The memory usage is bound by the specification. For dirty tracking for the renderer, we're going with the simple route that any glyph change marks a coarse grained dirty flag and we'll [in the future] rebuild the entire state in the renderer. I think this will be fine for realistic workloads, but we can reassess in the future when we have real workloads.