Add API resource for unified job stdout with HTML output of ANSI color codes.

awx/api/templates/api/unified_job_stdout.md

@@ -0,0 +1,28 @@
+# Retrieve {{ model_verbose_name|title }} Stdout:
+
+Make GET request to this resource to retrieve the stdout from running this
+{{ model_verbose_name }}.
+
+## Format
+
+Use the `format` query string parameter to specify the output format.
+
+* Browsable API: `?format=api`
+* HTML: `?format=html`
+* Plain Text: `?format=txt`
+* Plain Text with ANSI color codes: `?format=ansi`
+
+When using the HTML or API formats, use the `scheme` query string parameter to
+change the output colors.  The value must be one of the following (default is
+`ansi2html`):
+
+* `ansi2html`
+* `osx`
+* `xterm`
+* `xterm-bright`
+* `solarized`
+
+Use `dark=1` or `dark=0` as a query string parameter to force or disable a
+dark background.
+
+{% include "api/_new_in_awx.md" %}