Add LSP document sync transport

src/main.zig

@@ -3,6 +3,7 @@ const input = @import("input.zig");
 const job = @import("job.zig");
 const layout = @import("layout.zig");
 const leader = @import("leader.zig");
+const lsp = @import("lsp.zig");
 const mobile_acceptance = @import("mobile_acceptance.zig");
 const panel = @import("panel.zig");
 const protocol = @import("protocol.zig");
@@ -129,6 +130,7 @@ test {
     _ = job;
     _ = layout;
     _ = leader;
+    _ = lsp;
     _ = mobile_acceptance;
     _ = panel;
     _ = protocol;