Added cases to env0

ideas/dependency.md

  1. prepare env0
  2. `m = two`
 
+{/}
+
+## case 0.1 ##
+ 1. prepare env0
+ 2. do thing 1.1.1
+ 3. do thing 1.1.2
+
+## case 0.2 ##
+ 2. do thing 1.2.1
+ 3. do thing 1.2.2
+
 {/env1/}
 
 ## case 1.1 ##