Move exec out of pardes.zig into exec.zig

Pure move, no behaviour change (acme keeps this in exec.c): execute,
commandText, max_exec_depth, executeBuiltinLine, applyStartupConfig,
runBuiltin and applySettingBuiltin; the getarg-style operand code
(withArg, PointerOperand, pointerOperand, heldSelection, chordEachSel);
takesCommandLine and the terminals commands run in (spawnTty, spawnV9fsTty,
spawnTtyWithMount, evictLonePristineTty, replaceStillborn, ttyForDir);
placeDoc; and the save path (submitSave, saveFile, saveTo, askWrite), with
the acme-chords test, go verbatim to exec.zig.

The methods become free functions taking `p: *Pardes`. executeBuiltinLine
is called from ~170 places as `p.executeBuiltinLine(..)`, so Pardes keeps
one declaration alias for it and those call sites stay; the other 104 calls
change from `p.execute(..)` to `exec.execute(p, ..)`. ninep/ctl.zig has a
local named exec, so it writes `pardes.exec.execute` instead of importing
the file.

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

1 files changed, 3 insertions, 3 deletions

diff --git a/test/panes.zig b/test/panes.zig
index f45d42b2..f99f9d56 100644
--- a/test/panes.zig
+++ b/test/panes.zig
@@ -721,7 +721,7 @@ const TtySelectionTests = struct {
                 const p = try Pardes.init(std.testing.allocator, .{ .tty_only = true, .cols = 40, .rows = 24 });
                 defer p.deinit();
                 p.presentation.enabled = false;
-                p.spawnTty(0);
+                pardes.exec.spawnTty(p, 0);
                 for (p.panes[0..2]) |slot| {
                     slot.?.mode = .tty;
                     slot.?.tty_filter = false;
@@ -3111,8 +3111,8 @@ const TerminalTests = struct {
         defer p.deinit();
         while (p.nextEffect()) |_| {} // the host has not acknowledged spawn yet
 
-        try std.testing.expectEqual(@as(?usize, 0), p.execute(0, "echo first"));
-        try std.testing.expectEqual(@as(?usize, 0), p.execute(0, "echo second"));
+        try std.testing.expectEqual(@as(?usize, 0), pardes.exec.execute(p, 0, "echo first"));
+        try std.testing.expectEqual(@as(?usize, 0), pardes.exec.execute(p, 0, "echo second"));
         while (p.nextEffect()) |effect| switch (effect) {
             .write => return error.CommandEscapedBeforeFork,
             else => {},