Add ccache to pixi

Author: adel-mamin

pixi.toml

@@ -30,6 +30,7 @@ cspell = ">=8.17.2,<9"
 clang-tools = ">=19.1.7,<20"
 binutils = ">=2.43,<3"
 gdb = ">=15.1,<16"
+ccache = ">=4.10.1,<5"
 
 [pypi-dependencies]
 setuptools-scm = ">=8.1.0, <9"