Merge bitcoin/bitcoin#31192: depends, doc: List packages required to …

…build `qt` package separately

4747f03 depends, doc: List packages required to build `qt` package separately (Hennadii Stepanov)

Pull request description:

  Suggested in bitcoin/bitcoin#30997 (comment):
  > There's probably enough GUI-only stuff here, i.e `bison`, `ninja-build`, `python3`, `xz-utils`, that this could be moved to it's own `#### Gui` section.

ACKs for top commit:
  fanquake:
    ACK 4747f03

Tree-SHA512: 090af77606e9c1f87b3466d6a6c97745af456943495bc7df46cdb5e955f641c39da8a6f7590fd1cc0ea816e320d7c336a860faffc2b35b0d5014dabbc490d9f9

depends/README.md

@@ -41,11 +41,17 @@ The paths are automatically configured and no other options are needed.
 
 #### Common
 
-    apt install bison cmake curl make patch pkg-config python3 xz-utils
+    apt install cmake curl make patch
+
+#### GUI
+
+Skip the following packages if you don't intend to use the GUI and will build with [`NO_QT=1`](#dependency-options):
+
+    apt install bison g++ pkg-config python3 xz-utils
 
 #### For macOS cross compilation
 
-    apt install clang lld llvm g++ zip
+    apt install clang lld llvm zip
 
 Clang 18 or later is required. You must also obtain the macOS SDK before
 proceeding with a cross-compile. Under the depends directory, create a