Add copy of the working namelist in event_generator.

namelists/event-generator/icon_atmosphere.basic_working

+&run_nml
+    ltestcase                   = .false.
+    dtime                       =  180
+    output                      = 'nml'
+    msg_level                   = 15
+    num_lev                     = 90
+    lvert_nest                  = .false.
+    ldynamics                   = .true.
+    ltransport                  = .true.
+    ntracer                     = 5
+    iforcing                    = 3
+/
+
+
+&nwp_phy_nml
+    lupatmo_phy = .FALSE.
+/
+
+&grid_nml
+    dynamics_parent_grid_id     = 0
+    lredgrid_phys               = .true.
+/
+
+&extpar_nml
+    itopo                       = 1
+/
+
+&initicon_nml
+    init_mode                   = 1,
+    lconsistency_checks         = .false.
+    ana_varnames_map_file       = 'ana_varnames_map_file.txt'
+/
+
+! settings from operational setup for vertical coordinate
+&sleve_nml
+    min_lay_thckn               = 20.
+    max_lay_thckn               = 400.
+    htop_thcknlimit             = 14000.
+    top_height                  = 75000.
+    stretch_fac                 = 0.9
+    decay_scale_1               = 4000.
+    decay_scale_2               = 2500.
+    decay_exp                   = 1.2
+    flat_height                 = 16000.
+/
+
+&nonhydrostatic_nml
+    damp_height                 = 22000.
+    rayleigh_coeff              = 1
+/
+
+
+&parallel_nml
+    nproma                      = 16
+/
+
+! LATBC files, these files will be used as input for the next example.
+&output_nml
+    file_interval               = 'PT3600S'
+    output_start                = '#OUTPUT_START#'
+    output_end                  = '#OUTPUT_END#'
+    output_filename             = "latbc"
+    output_interval             = 'PT3600S'
+    include_last                = .true.
+    ml_varlist                  = 'u', 'v', 'w', 'theta_v', 'rho', 'qv', 'qc', 'qi', 'qr', 'qs', 'z_ifc'
+/
+
+! First Guess file
+&output_nml
+    file_interval               = 'PT3600S'
+    output_start                = '#OUTPUT_START#'
+    output_end                  = '#OUTPUT_END#'
+    output_filename             = "init"
+    output_interval             = 'PT3600S'
+    include_last                = .true.
+    ml_varlist                  = 'group:dwd_fg_atm_vars', 'group:dwd_fg_sfc_vars'
+/