Add some example help

Author: jcrossley3

example-projects/actix-web-example/README.md

@@ -0,0 +1,23 @@
+To run the server:
+
+```console
+cargo run
+```
+
+To test a GET:
+
+```console
+curl http://localhost:9000
+```
+
+To test a POST:
+
+```console
+curl -d '{"hello": "world"}' \
+  -H'content-type: application/json' \
+  -H'ce-specversion: 1.0' \
+  -H'ce-id: 1' \
+  -H'ce-source: http://cloudevents.io' \
+  -H'ce-type: dev.knative.example' \
+  http://localhost:9000
+```

example-projects/axum-example/README.md

@@ -0,0 +1,23 @@
+To run the server:
+
+```console
+cargo run
+```
+
+To test a GET:
+
+```console
+curl http://localhost:8080
+```
+
+To test a POST:
+
+```console
+curl -d '{"hello": "world"}' \
+  -H'content-type: application/json' \
+  -H'ce-specversion: 1.0' \
+  -H'ce-id: 1' \
+  -H'ce-source: http://cloudevents.io' \
+  -H'ce-type: dev.knative.example' \
+  http://localhost:8080
+```

example-projects/warp-example/README.md

@@ -0,0 +1,17 @@
+To run the server:
+
+```console
+cargo run
+```
+
+To test a POST:
+
+```console
+curl -d '{"hello": "world"}' \
+  -H'content-type: application/json' \
+  -H'ce-specversion: 1.0' \
+  -H'ce-id: 1' \
+  -H'ce-source: http://cloudevents.io' \
+  -H'ce-type: dev.knative.example' \
+  http://localhost:3030
+```