Add cmake compatibility to c-api (#4369)

* Add cmake compatibility to c-api

* Add CMake documentation to wasmtime.h

* Add CMake instructions in examples

* Modify CI for CMake support

* Use correct rust in CI

* Trigger build

* Refactor run-examples

* Reintroduce example_to_run in run-examples

* Replace run-examples crate with cmake

* Fix markdown formatting in examples readme

* Fix cmake test quotes

* Build rust wasm before cmake tests

* Pass CTEST_OUTPUT_ON_FAILURE

* Another cmake test

* Handle os differences in cmake test

* Fix bugs in memory and multimemory examples

examples/tokio/main.c

@@ -1,5 +0,0 @@
-int main(int argc, char *argv[]) {
-    // This example is specific to integrating with Rust's tokio ecosystem, so
-    // it isnt applicable to C/C++.
-    return 0;
-}