feature: allow additional arguments after shorthand syntax

This allows to combine the shorthand syntax with additional arguments:
```
CPMAddPackage("gh:nlohmann/[email protected]" OPTIONS "JSON_BUildTests OFF")
```

This is much shorter than the longer syntax way of writing:
```
CPMAddPackage(
  NAME nlohmann_json
  VERSION 3.9.1
  GITHUB_REPOSITORY nlohmann/json
  OPTIONS
    "JSON_BuildTests OFF"
)
```

Author: SGSSGene

cmake/CPM.cmake

@@ -575,14 +575,6 @@ endfunction()
 function(CPMAddPackage)
   cpm_set_policies()
 
-  list(LENGTH ARGN argnLength)
-  if(argnLength EQUAL 1)
-    cpm_parse_add_package_single_arg("${ARGN}" ARGN)
-
-    # The shorthand syntax implies EXCLUDE_FROM_ALL and SYSTEM
-    set(ARGN "${ARGN};EXCLUDE_FROM_ALL;YES;SYSTEM;YES;")
-  endif()
-
   set(oneValueArgs
       NAME
       FORCE
@@ -605,6 +597,28 @@ function(CPMAddPackage)
 
   set(multiValueArgs URL OPTIONS DOWNLOAD_COMMAND PATCHES)
 
+  list(LENGTH ARGN argnLength)
+
+  # Parse single shorthand argument
+  if(argnLength EQUAL 1)
+    cpm_parse_add_package_single_arg("${ARGN}" ARGN)
+
+    # The shorthand syntax implies EXCLUDE_FROM_ALL and SYSTEM
+    set(ARGN "${ARGN};EXCLUDE_FROM_ALL;YES;SYSTEM;YES;")
+
+    # Parse shorthand argument as first argument but with following arguments
+  elseif(
+    argnLength GREATER 1
+    AND NOT "${ARGV0}" IN_LIST oneValueArgs
+    AND NOT "${ARGV0}" IN_LIST multiValueArgs
+  )
+    list(POP_FRONT ARGN)
+    cpm_parse_add_package_single_arg("${ARGV0}" ARGV0)
+
+    # The shorthand syntax implies EXCLUDE_FROM_ALL and SYSTEM
+    set(ARGN "${ARGV0};${ARGN};EXCLUDE_FROM_ALL;YES;SYSTEM;YES;")
+  endif()
+
   cmake_parse_arguments(CPM_ARGS "" "${oneValueArgs}" "${multiValueArgs}" "${ARGN}")
 
   # Set default values for arguments