[orbit] Initial integration (#4386)

Adding basic `project.yaml` file to request project acceptance.

projects/orbit/project.yaml

@@ -0,0 +1,10 @@
+homepage: "https://github.com/google/orbit"
+language: c++
+primary_contact: "hebecker@google.com"
+auto_ccs :
+  - "orbitprofiler-eng+fuzztests@google.com"
+
+fuzzing_engines:
+  - libfuzzer
+sanitizers:
+  - address