Implementation of 0D dummy pusher and modifications to input parameters

to allow 0D runs.

src/modules/moduleSolver.f90

@@ -102,6 +102,9 @@ MODULE moduleSolver
       CASE('1DRadCharged')
         self%pushParticle => push1DRadCharged
 
+      CASE('0D')
+        self%pushParticle => push0D
+
       CASE DEFAULT
         CALL criticalError('Pusher ' // pusherType // ' not found','initPusher')
 
@@ -483,6 +486,17 @@ MODULE moduleSolver
 
     END SUBROUTINE push1DRadCharged
 
+    !Dummy pusher for 0D geometry
+    PURE SUBROUTINE push0D(part, tauIn)
+      USE moduleSpecies
+      USE moduleEM
+      IMPLICIT NONE
+
+      TYPE(particle), INTENT(inout):: part
+      REAL(8), INTENT(in):: tauIn
+
+    END SUBROUTINE push0D
+
     SUBROUTINE doReset()
       USE moduleSpecies
       USE moduleMesh