gitignore: clean up

all these files belong into a build directory instead of being ignored
by git. The ones that don't belong into a build directory need to be
known by git.

.gitignore

@@ -9,7 +9,7 @@ __pycache__/
 # Distribution / packaging
 .Python
 env/
-build/
+*build*
 develop-eggs/
 dist/
 downloads/
@@ -53,9 +53,6 @@ coverage.xml
 *.log
 local_settings.py
 
-# Sphinx documentation
-docs/_build/
-
 # PyBuilder
 target/
 
@@ -71,9 +68,6 @@ target/
 # Pycharm / Clion
 .idea
 
-# CMake
-cmake-build-*/
-
 # MacOSX Files
 .DS_Store
 
@@ -95,16 +89,6 @@ slprj/
 *.asv
 Thumbs.db
 
-# Arduino
-build-uno
-
-CMakeCache.txt
-CMakeFiles
-Makefile
-*.cmake
-
-server
-
 sh.exe.stackdump
 
 uv.lock