feat(darwin)!: update config

Add `nix` initialization script to shell's `extraConfig`
  - fixes `nix` when updating MacOS
Add `flameshot` to `brew` packages
Fix tilde (`~`) remapping
  - mysteriously switched after a restart, needed to swap
Add (noncompiling) `borders` (`JankyBorders`) config
Add `TODO` to `sketchybar` config

modules/nix-darwin/yabai/borders/default.nix

@@ -0,0 +1,26 @@
+{ lib, fetchFromGitHub, darwin, ... }:
+
+# TODO: fix clang issue (works with native `/usr/bin/clang`)
+#
+# > Undefined symbols for architecture arm64:
+# >   "_SLSWindowManagementBridgeSetDelegate", referenced from:
+# >       _main in main.o
+# > ld: symbol(s) not found for architecture arm64
+
+darwin.apple_sdk.stdenv.mkDerivation rec {
+  pname = "JankyBorders";
+  version = "dev";
+
+  src = fetchFromGitHub {
+    owner = "FelixKratz";
+    repo = "JankyBorders";
+    rev = "6bc201813bc163c6f5a20d5fa744f7b0d1f31773";
+    sha256 = "sha256-b4+aJkP1yqz8x5EUDDVQmqrmLus+Y69RViAeaLvfGXE=";
+  };
+
+  buildInputs = with darwin.apple_sdk.frameworks; [
+    AppKit
+    SkyLight
+    darwin.apple_sdk.Libsystem
+  ];
+}

modules/nix-darwin/yabai/sketchybar/default.nix

@@ -1,4 +1,5 @@
 # TODO: AppleSelectedInputSourcesChangedNotification
+# TODO: no `PLUGIN_DIR` and `UTIL_DIR`, directly reference scripts
 { lib, darwin, ... }:
 
 let

modules/nix-darwin/yabai/skhdrc

@@ -98,6 +98,9 @@ shift + cmd - space : \
     yabai -m window --toggle border; \
     sketchybar --trigger window_focus
 
+# Prepare (next spawned window) to swallow parent
+alt - s : yabai -m window --insert stack
+
 # Restart Yabai
 shift + lctrl + alt - r : \
     /usr/bin/env osascript <<< \