Move the File namespace out of panes.zig into File.zig

Pure move: the body of `pub const File = struct { ... }` is now the file
File.zig, dedented, with the imports it uses; panes.zig keeps
`pub const File = @import("File.zig");`, so `panes.File.x` callers and the
`File.State` field of Pane are unchanged. File.zig joins the embedded
source list.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/src/fs.zig b/src/fs.zig
index e6ebddf2..8ed6fc77 100644
--- a/src/fs.zig
+++ b/src/fs.zig
@@ -36,6 +36,7 @@ else
 const source_files = [_]Source{
     .{ .path = "src/pardes.zig", .contents = @embedFile("pardes.zig") },
     .{ .path = "src/panes.zig", .contents = @embedFile("panes.zig") },
+    .{ .path = "src/File.zig", .contents = @embedFile("File.zig") },
     .{ .path = "src/Output.zig", .contents = @embedFile("Output.zig") },
     .{ .path = "src/Mini.zig", .contents = @embedFile("Mini.zig") },
     .{ .path = "src/image.zig", .contents = @embedFile("image.zig") },