Add debugging and clean build directory for meson

- Add debug output to show current directory and contents
- Remove existing build directory before creating new one
- This should resolve the 'Build directory cannot be a parent of source directory' error
- Add logging to help diagnose meson configuration issues

The build directory might be persisting from previous runs, causing
meson to detect the parent/source directory conflict.

.forgejo/workflows/ci.yml

@@ -95,7 +95,11 @@ jobs:
         cd fuse-3.10.0
         
         # Build libfuse
+        echo "Current directory: $(pwd)"
+        echo "Contents: $(ls -la)"
+        rm -rf build
         mkdir build && cd build
+        echo "Build directory: $(pwd)"
         meson setup --prefix=/usr --libdir=lib/x86_64-linux-gnu ..
         ninja