Merge bitcoin/bitcoin#33789: doc: add cmake help option in Windows build docs

9577daa3b8 doc: Add cmake help option in Windows build instructions (frankomosh)

Pull request description:

  Follow-up to #33088.

  Adds `cmake -B build -LH` documentation to Windows build guides, similar to Unix build documentation.

  Based on the suggestion and example provided by stickies-v in #33088, with minor adjustment to match existing indented code block format in `build-windows.md`.

  Tested for:
  - WSL Ubuntu with mingw-w64 cross-compilation
  - Windows 11 with Visual Studio 2022 (MSVC)

ACKs for top commit:
  waketraindev:
    ACK 9577daa
  stickies-v:
    ACK 9577daa3b8
  hebasto:
    ACK 9577daa3b8.
  pablomartin4btc:
    ACK 9577daa3b8

Tree-SHA512: a9c08944aff962a61d0111317b79cbb44368e85d0255daf8d3c229c6532cf8c11046fe6bba81025ef994d92b4324247ec75f5bdaf4a89b3ef403c5be37e63bd8

doc/build-windows-msvc.md

@@ -50,6 +50,8 @@ CMake will put the resulting object files, libraries, and executables into a ded
 
 In the following instructions, the "Debug" configuration can be specified instead of the "Release" one.
 
+Run `cmake -B build -LH` to see the full list of available options.
+
 ### 4. Building with Static Linking with GUI
 
 ```

doc/build-windows.md

@@ -49,6 +49,9 @@ Build using:
 
     gmake -C depends HOST=x86_64-w64-mingw32  # Append "-j N" for N parallel jobs.
     cmake -B build --toolchain depends/x86_64-w64-mingw32/toolchain.cmake
+
+Run `cmake -B build -LH` to see the full list of available options.
+
     cmake --build build     # Append "-j N" for N parallel jobs.
 
 ## Depends system