Add attachfocused patch.

This patch changes dwl to make new clients attach below the currently
focused one, like you can do on hyprland.

patches/attachfocused/README.md

@@ -0,0 +1,13 @@
+### Description
+Makes windows attach below the currently active window.
+
+### Download
+- [0.7](/dwl/dwl-patches/raw/branch/main/patches/attachfocused/attachfocused.patch)
+                Use the ^RAW^ patch link here
+   ^^^ "0.7" is an example. Use the release that your patch targets
+
+### Authors - latest at top [Codeberg nick is mandatory; other contact methods optional]
+- [YOUR_NICK](https://codeberg.org/USERNAME)
+  your_email@if_you_wish_to.share.it
+  your_irc_nick at [Libera IRC dwl channel](https://web.libera.chat/?channels=#dwl)
+  your_discord_handle at [dwl Discord](https://discord.gg/jJxZnrGPWN)

patches/attachfocused/attachfocused.patch

@@ -0,0 +1,29 @@
+From d03851c14073874f5b3d19a095e184dc24d219cd Mon Sep 17 00:00:00 2001
+From: MayOrMayNotBeACat <maybeacat804@gmail.com>
+Date: Sun, 11 May 2025 20:24:51 -0400
+Subject: [PATCH] Make new windows attach to active client
+
+---
+ dwl.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/dwl.c b/dwl.c
+index cf3ef70..1907c5f 100644
+--- a/dwl.c
++++ b/dwl.c
+@@ -1726,7 +1726,11 @@ mapnotify(struct wl_listener *listener, void *data)
+ 	c->geom.height += 2 * c->bw;
+ 
+ 	/* Insert this client into client lists. */
+-	wl_list_insert(&clients, &c->link);
++	Client* focused = focustop(selmon);
++	if (focused)
++		wl_list_insert(&focused->link, &c->link);
++	else
++		wl_list_insert(&clients, &c->link);
+ 	wl_list_insert(&fstack, &c->flink);
+ 
+ 	/* Set initial monitor, tags, floating status, and focus:
+-- 
+2.49.0
+