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, 4 insertions, 3 deletions

diff --git a/src/normal.zig b/src/normal.zig
index e273f7f1..6647dcca 100644
--- a/src/normal.zig
+++ b/src/normal.zig
@@ -2,6 +2,7 @@
 //! modal actions, replayed across every selection, and each action is done
 //! to the pane; PDF panes get their own normal keys.
 const pardes = @import("pardes.zig");
+const exec = @import("exec.zig");
 const look = @import("look.zig");
 const std = @import("std");
 const mvzr = @import("mvzr");
@@ -302,7 +303,7 @@ fn executeNormalAction(p: *Pardes, pane: *Pane, semantic: modal.Normal.Action) v
     switch (semantic) {
         .escape => {
             pane.select = false;
-            return p.runBuiltin(.Last, p.active, "", null);
+            return exec.runBuiltin(p, .Last, p.active, "", null);
         },
         .goto => |go| switch (go.target) {
             .file_start => {
@@ -566,11 +567,11 @@ pub fn handlePdfNormal(p: *Pardes, pane: *Pane, key: Key) void {
     if (hit(key, config.leave_pane)) {
         pane.normal.clear();
         pane.select = false;
-        return p.runBuiltin(.Last, p.active, "", null);
+        return exec.runBuiltin(p, .Last, p.active, "", null);
     }
     if (pane.normal.prefix == .none and isPrefix(key, 'f')) {
         pane.normal.clear();
-        return p.runBuiltin(.PdfSections, p.active, "", null);
+        return exec.runBuiltin(p, .PdfSections, p.active, "", null);
     }
     const parsed = modal.Normal.parse(&pane.normal, normalInput(key));
     switch (parsed) {