client: src: refactor environment/gen handler

- Moves environment handling from `lib_gen` to `lib_env`
- Related refactoring

client/src/docker/lib/lib_docker.bash

@@ -26,7 +26,10 @@
 # Docker impl
 source "${DOCKER_FINANCE_CLIENT_REPO}/client/src/docker/lib/internal/lib_docker.bash" || exit 1
 
-# Environment generation
+# Runtime environment handler
+source "${DOCKER_FINANCE_CLIENT_REPO}/client/src/docker/lib/internal/lib_env.bash" || exit 1
+
+# Environment layout generator
 source "${DOCKER_FINANCE_CLIENT_REPO}/client/src/docker/lib/internal/lib_gen.bash" || exit 1
 
 # Plugins support
@@ -114,8 +117,8 @@ function lib_docker::docker()
   declare -gxr global_usage="$global_basename ${global_platform}${global_arg_delim_1}${global_user}:${global_tag} $global_command"
   lib_utils::print_debug "global_usage=${global_usage}"
 
-  # Setup remaining client/container globals
-  lib_gen::gen || return $?
+  # Setup remaining environment globals
+  lib_env::env || return $?
 
   # Remaining "constructor" implementation
   lib_docker::__docker || return $?
@@ -129,7 +132,7 @@ function lib_docker::docker()
 
 function lib_docker::gen()
 {
-  lib_gen::generate
+  lib_gen::gen
   lib_utils::catch $?
 }