cmake: add ggml find package (#11369)

* Add initial ggml cmake package

* Add build numbers to ggml find-package

* Expand variables with GGML_ prefix

* Guard against adding to cache variable twice

* Add git to msys2 workflow

* Handle ggml-cpu-* variants

* Link ggml/ggml-base libraries to their targets

* Replace main-cmake-pkg with simple-cmake-pkg

* Interface features require c_std_90

* Fix typo

* Removed unnecessary bracket from status message

* Update examples/simple-cmake-pkg/README.md

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

* Update examples/simple-cmake-pkg/README.md

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

---------

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

examples/simple-cmake-pkg/.gitignore

@@ -0,0 +1,50 @@
+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+*.gguf
+
+*.log
+.DS_Store
+.build/
+.cache/
+.direnv/
+.envrc
+.swiftpm
+.venv
+.clang-tidy
+.vs/
+.vscode/
+
+build*/
+out/
+tmp/