[eclipse-iceoryx#210] Add minimal README for C examples

examples/c/README.md

@@ -0,0 +1,28 @@
+# Instructions
+
+## Build
+
+```console
+cmake -B target/lang-c .
+cmake --build target/lang-c
+```
+
+## Run Examples
+
+### Publish-Subscribe
+
+Run in two separate terminals. Note, currently the examples run for 10 seconds.
+
+```console
+target/lang-c/examples/c/publish_subscribe/example_c_publisher
+```
+
+```console
+target/lang-c/examples/c/publish_subscribe/example_c_subscriber
+```
+
+### Discovery
+
+```console
+target/lang-c/examples/c/discovery/example_c_discovery
+```