When calling
```
find_package(Rizin REQUIRED COMPONENTS Core)
find_package(Rizin REQUIRED COMPONENTS Util)
```
The first call would create only `Rizin::Core`, but `rz_util_FOUND`
would aso be true. Thus, in the second call, `Rizin::Util` would not be
created because of this check.
So instead of the `..._FOUND` variable, we directly check if the
`Rizin::...` target exists.
* Remove wrong librz.pc.in file
* Add plugindir variable to .pc files to allow easy plugin configuration
* Add CMake config files to find Rizin in CMake projects
* Add CI jobs to check cmake files
* Provide workaround for mesonbuild/meson#9702
* Use .lib suffix and no prefix on MSVC to make CMake files work
* Disable cmake files on static libraries build
