Help: Show environment field

Help/manual/presets/example.json

@@ -19,6 +19,10 @@
         },
         "SECOND_CACHE_VARIABLE": "ON"
       },
+      "environment": {
+        "MY_ENVIRONMENT_VARIABLE": "Test",
+        "PATH": "$env{HOME}/ninja/bin:$penv{PATH}"
+      },
       "vendor": {
         "example.com/ExampleIDE/1.0": {
           "autoFormat": true

Tests/RunCMake/CMakePresets/DocumentationExample.cmake

@@ -2,3 +2,4 @@ include(${CMAKE_CURRENT_LIST_DIR}/TestVariable.cmake)
 
 test_variable(FIRST_CACHE_VARIABLE "BOOL" "OFF")
 test_variable(SECOND_CACHE_VARIABLE "UNINITIALIZED" "ON")
+test_environment_variable(MY_ENVIRONMENT_VARIABLE "Test")