feat: add nuke-state

...duh

README.md

@@ -10,6 +10,7 @@ a simple shift register built on piperw(1)
 init-state <name>
 load-state <name> <target>
 save-state <name> <value>
+nuke-state <name>
 ```
 
 ```sh
@@ -17,6 +18,7 @@ save-state <name> <value>
 
 init-state flip
 save-state flip "up"
+foreground {
 	forstdin -E line
 		load-state flip current
 		println "! state: $current"
@@ -28,4 +30,6 @@ forstdin -E line
 			save-state flip "up"
 		}
 		save-state flip "$current"
+}
+nuke-state flip
 ```

nuke-state

@@ -0,0 +1,12 @@
+#!/bin/execlineb
+
+importas -ui name 1
+importas -ui rdfd ELSTATE_${name}
+backtick -E wrfd { s6-expr "$rdfd" + 1 }
+
+fdclose ${rdfd}
+fdclose ${wrfd}
+
+shift
+elgetpositionals
+$@