manuals: suppress excess use of "following" word

To simplify the style, replace "Following is" and "Following are"
by "here is" and "here are", sounding more natural.

In some cases, also go further by simplifying "Here are/is xxx"
by "xxx are/is" when the "are" or "is" are not two far at
the end of the sentence.

In some cases too, completely remove the sentence, when
it's redundant with the preceding title.

(From yocto-docs rev: 52ba6bb16c73cbc2c0e77496d5226c49bce786f5)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
CC: Daniel Ammann <daniel.ammann@bytesatwork.ch>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/terms.rst

@@ -4,7 +4,7 @@
 Yocto Project Terms
 *******************
 
-Following is a list of terms and definitions users new to the Yocto Project
+Here is a list of terms and definitions users new to the Yocto Project
 development environment might find helpful. While some of these terms are
 universal, the list includes them just in case:
 
@@ -67,7 +67,7 @@ universal, the list includes them just in case:
       :term:`TOPDIR` variable points to the :term:`Build Directory`.
 
       You have a lot of flexibility when creating the :term:`Build Directory`.
-      Following are some examples that show how to create the directory.  The
+      Here are some examples that show how to create the directory.  The
       examples assume your :term:`Source Directory` is named ``poky``:
 
          -  Create the :term:`Build Directory` inside your Source Directory and let