Test build args file

This is a test file representing the generated file in //docs which contains the comments from all args declared in .gni files.

Most of the errors are about code that is not in code blocks that looks like references

something_like = [ “file1”, “file2” ]

or a multiline list = [ “file1”, “file2.txt” ]

Current value (from the default): ["detect_stack_use_after_return=1", "quarantine_size_mb=32"]

This can be set in args.gn by vendor-specific build configurations. Consider the following example from a fictitious //vendor/acme/proprietary/BUILD.gn file:

 # Generate the firmware for our device.
 action("generate_firmware") {
   ...
 }

 # Ensure the generated firmware is visible to Bazel as a filegroup()
 # @legacy_ninja_build_outputs repository//:acme_firmware
 bazel_input_resource("acme_firmware") {
   deps = [ ":generate_firmware" ]
   sources = get_target_outputs(deps[0])
   outputs = [ "{{source_file_part}}" ]
   visibility = [ ":*" ]
 }

 # Build the installer with Bazel.
 bazel_action("build_installer") {
   command = "build"
   bazel_targets = "//vendor/acme/proprietary/installer"
   bazel_inputs = [ ":acme_firmware" ]
   copy_outputs = [
     {
       bazel = "vendor/acme/proprietary/installer/installer"
       ninja = "installer"
     }
   ]
 }