intellij: add launch configuration presets for single node and e2e

- Run e2e tests normally with streamed output
- Run e2e tests without caching and -c dbg
- Run e2e tests without caching, -c dbg and with dlv
- Run all tests normally
- Run a single node cluster normally
- Run a single node cluster with -c dbg

Test Plan: Ran 'em all.

X-Origin-Diff: phab/D582
GitOrigin-RevId: 6d78ee3ea4e4c4e2c0096fc4e6f449dbcdb333ca
diff --git a/README.md b/README.md
index eb40c08..3abaa30 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,16 @@
 Running commands: `scripts/run_in_container.sh <...>`
 
 Using bazel using a wrapper script: `scripts/bin/bazel <...>` (add to your local $PATH for convenience)
+
+#### Run a single node cluster
+
+Launch the node:
+
+    bazel run //:launch
+    
+Run a kubectl command:
+
+    bazel run //core/cmd/dbg -- kubectl describe
  
 #### IntelliJ