better gitignore

.gitignore

@@ -1,54 +1,21 @@
-# ---> C
-# Prerequisites
-*.d
-
-# Object files
+# Build outputs
 *.o
-*.ko
 *.obj
-*.elf
-
-# Linker output
-*.ilk
-*.map
-*.exp
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Libraries
-*.lib
 *.a
-*.la
-*.lo
-
-# Shared objects (inc. Windows DLLs)
-*.dll
+*.lib
 *.so
 *.so.*
+*.dll
 *.dylib
-
-# Executables
 *.exe
 *.out
-*.app
-*.i*86
-*.x86_64
-*.hex
 
-# Debug files
-*.dSYM/
-*.su
-*.idb
+# Debug and coverage artifacts
+*.gcda
+*.gcno
+*.gcov
 *.pdb
+coverage/
 
-# Kernel Module Compile Results
-*.mod*
-*.cmd
-.tmp_versions/
-modules.order
-Module.symvers
-Mkfile.old
-dkms.conf
-
+# Demo build output
+demo/build/