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, 5 insertions, 5 deletions

diff --git a/test/panes.zig b/test/panes.zig
index f99f9d56..1c861070 100644
--- a/test/panes.zig
+++ b/test/panes.zig
@@ -2039,7 +2039,7 @@ test "file history survives PDF fallback restoration and allocation failures" {
     var succeeded = false;
     for (0..256) |failure| {
         var failing = std.testing.FailingAllocator.init(std.testing.allocator, .{ .fail_index = failure });
-        if (Pardes.initFromDump(failing.allocator(), .{ .tty_only = true }, saved)) |p| {
+        if (pardes.dump.initFromDump(failing.allocator(), .{ .tty_only = true }, saved)) |p| {
             defer p.deinit();
             const pane = p.panes[0].?;
             try std.testing.expect(pane.file != null);
@@ -2416,8 +2416,8 @@ const OutputTests = struct {
             neighbor_colored = neighbor_colored or style != 0;
         try std.testing.expect(neighbor_colored);
 
-        try p.dumpState();
-        const restored = try Pardes.initFromDump(p.gpa, .{ .tty_only = true }, p.dump_out.?);
+        try pardes.dump.dumpState(p);
+        const restored = try pardes.dump.initFromDump(p.gpa, .{ .tty_only = true }, p.dump_out.?);
         defer restored.deinit();
         const restored_source = restored.panes[0].?;
         const restored_id = pane.search_pane.?;
@@ -2520,8 +2520,8 @@ const OutputTests = struct {
         try std.testing.expectEqual(.match, file.location_rows[next].kind);
         const wrapped = panes.Output.nextResult(file.content, file.location_rows, path, .{ .line = 99 });
         try std.testing.expectEqual(@as(usize, 2), file.location_rows[wrapped].at.line);
-        try p.dumpState();
-        const restored = try Pardes.initFromDump(p.gpa, .{ .tty_only = true }, p.dump_out.?);
+        try pardes.dump.dumpState(p);
+        const restored = try pardes.dump.initFromDump(p.gpa, .{ .tty_only = true }, p.dump_out.?);
         defer restored.deinit();
         const restored_file = &restored.panes[pane.search_pane.?].?.file.?;
         try std.testing.expectEqualStrings(file.content, restored_file.content);