Move saving and loading a whole editor out of pardes.zig into dump.zig

Pure move, no behaviour change (acme keeps dump and load in rows.c):
dumpState, restore, initFromDump and initDump go verbatim to the end of
dump.zig, after the dump format they read and write. Inside dump.zig the
moved code's `dump.` prefix drops, so `Pane` there is the dump record; the
one editor pane it names is spelled `pardes.panes.Pane`, and its other
`panes.X` references become `pardes.panes.X` because dump.zig's own tests
use `panes` as a local name.

The methods become free functions taking `p: *Pardes`: `p.dumpState()`
becomes `dump.dumpState(p)`, `core.restore(bytes)` becomes
`dump.restore(core, bytes)` and `Pardes.initFromDump(..)` becomes
`dump.initFromDump(..)`, in pardes.zig, the shells, layout.zig,
Terminal.zig, builtins.zig and the tests (38 receiver rewrites plus the
initFromDump calls). The tag-tail restore helpers stay with the tag code.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/detached/client.zig b/src/detached/client.zig
index a027c0bb..7cee790a 100644
--- a/src/detached/client.zig
+++ b/src/detached/client.zig
@@ -59,6 +59,7 @@
 const std = @import("std");
 const libc = std.c;
 const pardes = @import("../pardes.zig");
+const dump = @import("../dump.zig");
 const server = @import("server.zig");
 const wire = @import("wire.zig");
 
@@ -842,7 +843,7 @@ test "detached Restore keeps attached frontends and follows queued frames with a
     try testing.expectEqual(fd, h.session.clients[c.slot].fd);
     try testing.expect(h.session.clients[c.slot].attached);
 
-    try h.core.dumpState();
+    try dump.dumpState(h.core);
     const saved = try testing.allocator.dupe(u8, h.core.dump_out.?);
     defer testing.allocator.free(saved);
     while (h.core.nextEffect()) |_| {}