[clang-tools-extra] [llvm] [clang-tools-extra][docs] Convert maintainers file to Markdown (PR #200365)

[Nikita Popov via cfe-commits]

================
@@ -26,13 +27,13 @@
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ["sphinx.ext.todo", "sphinx.ext.mathjax"]
+extensions = ["sphinx.ext.todo", "sphinx.ext.mathjax", "myst_parser"]
----------------
nikic wrote:

Can you please change this to our standard myst_parser dependency pattern?
```
try:
    import myst_parser

    extensions.append("myst_parser")
except ImportError:
    if not tags.has("builder-man"):
        raise
```

https://github.com/llvm/llvm-project/pull/200365