Add support for Conan Package Manager

This enables us to use conan to download both CMake and libyaml when
building simpleconfig.

.gitignore

@@ -1,2 +1,3 @@
 build
 *.swp
+CMakeUserPresets.json

README.md

@@ -23,7 +23,9 @@ libyaml is needed to build simpleconfig.
 
 ## Build
 
-Simpleconfig is built like most other cmake projects:
+### Build using vanilla CMake
+
+Simpleconfig can be built like most other cmake projects:
 
 ```
 mkdir build && cd build
@@ -32,6 +34,21 @@ make
 make install
 ```
 
+### Build using Conan Package Manager
+
+It's also possible to build simpleconfig using Conan:
+
+```
+conan profile detect
+conan install . --output-folder build --build=missing
+cd build
+source conanbuild.sh
+cmake --preset conan-release ..
+make
+make install
+source deactivate_conanbuild.sh
+```
+
 ## Example
 
 See `examples/minimal.c` for an example showing off the basics of simpleconfig.

conanfile.txt

@@ -0,0 +1,9 @@
+[requires]
+libyaml/0.2.5
+
+[tool_requires]
+cmake/3.25.3
+
+[generators]
+CMakeDeps
+CMakeToolchain