doc: Migrate Process wiki page to Sphinx

Move the current Process wiki page to doc/develop/process.rst.  The
changes here are for formatting or slight rewording so that it reads
well when linking to other Sphinx documents.

Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/doc/develop/index.rst b/doc/develop/index.rst
index c0f4f0b..eab00a5 100644
--- a/doc/develop/index.rst
+++ b/doc/develop/index.rst
@@ -11,6 +11,7 @@
 
    codingstyle
    designprinciples
+   process
 
 Implementation
 --------------