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, 3 insertions, 3 deletions

diff --git a/test/pdf.zig b/test/pdf.zig
index dde58df8..8e87dfb1 100644
--- a/test/pdf.zig
+++ b/test/pdf.zig
@@ -301,7 +301,7 @@ test "PDF dump fallback remains a byte-preserving file" {
     defer out.deinit();
     try std.zon.stringify.serialize(state, .{ .whitespace = true }, &out.writer);
 
-    const restored = try Pardes.initFromDump(gpa, .{ .tty_only = true }, out.written());
+    const restored = try pardes.dump.initFromDump(gpa, .{ .tty_only = true }, out.written());
     defer restored.deinit();
     const pane = restored.panes[0].?;
     try std.testing.expect(pane.file != null);
@@ -921,8 +921,8 @@ test "MuPDF pane renders, navigates, searches, and round-trips its page" {
     @memcpy(pane.tag_tail[0..custom_tail.len], custom_tail);
     pane.tag_tail_len = custom_tail.len;
     pane.tag_init = true;
-    try p.dumpState();
-    const restored = try Pardes.initFromDump(gpa, .{}, p.dump_out.?);
+    try pardes.dump.dumpState(p);
+    const restored = try pardes.dump.initFromDump(gpa, .{}, p.dump_out.?);
     defer restored.deinit();
     try std.testing.expect(hasPdf(restored.panes[0].?));
     try std.testing.expectEqual(pane.pdf.?.page, restored.panes[0].?.pdf.?.page);