docs: heavy editing to make this happy with latest wikibridge.

The public headers saw lots of cleanups, backporting from SDL3 docs, and
merging with the wiki.

The markdown files in docs/README-*.md were converted to Unix endlines.

docs/README-wince.md

@@ -1,10 +1,10 @@
-WinCE
-=====
-
-Windows CE is no longer supported by SDL.
-
-We have left the CE support in SDL 1.2 for those that must have it, and we
-have support for Windows Phone 8 and WinRT in SDL2, as of SDL 2.0.3.
-
---ryan.
-
+WinCE
+=====
+
+Windows CE is no longer supported by SDL.
+
+We have left the CE support in SDL 1.2 for those that must have it, and we
+have support for Windows Phone 8 and WinRT in SDL2, as of SDL 2.0.3.
+
+--ryan.
+