Add class cmRST to do basic reStructuredText processing

Create a cmRST class to perform just enough reStructuredText processing
to support display of Help documents in human-readable text format.
This will be used to implement --help-* command-line options.

Support directives "include", "replace", "parsed-literal", "toctree"
(Sphinx), and "cmake-module" (CMake Sphinx Extension to scan .cmake
modules).  Support inline CMake Sphinx Domain roles to convert
cross-references to corresponding title text.  Support inline
substitutions defined by the "replace" directive, but keep it simple by
requiring replacements to be defined before use.

Add a CMakeLib "testRST" case to cover processing of supported
constructs and compare results against expected output.

1 files changed, 2 insertions, 0 deletions

diff --git a/Tests/CMakeLib/testRSTtoc1.rst b/Tests/CMakeLib/testRSTtoc1.rst
new file mode 100644
index 0000000..fa7806e
--- /dev/null
+++ b/Tests/CMakeLib/testRSTtoc1.rst
@@ -0,0 +1,2 @@
+.. |not replaced| replace:: not replaced across toctree
+First TOC entry.