Adds application integration for stand-alone usage to the documentation

[froschdesign]

Related to laminas/documentation#8

[weierophinney]

This looks straight-forward and useful. I like the idea of promoting the fact that the various components of the MVC can be used on their own.

[froschdesign]

@weierophinney
The idea based on various support questions and was first test during the rework of zend-i18n documentation.

The preview of zend-i18n goes one step further and contains one more example: "Usage in a Slim Application"

[froschdesign]

An example which illustrates the usage with a layout script should be added.

[weierophinney]

This repository has been closed and moved to laminas/laminas-view; a new issue has been opened at laminas/laminas-view#4.

[weierophinney]

This repository has been moved to laminas/laminas-view. If you feel that this patch is still relevant, please re-open against that repository, and reference this issue. To re-open, we suggest the following workflow:

• Squash all commits in your branch (git rebase -i origin/{branch})
• Make a note of all changed files (`git diff --name-only origin/{branch}...HEAD
• Run the laminas/laminas-migration tool on the code.
• Clone laminas/laminas-view to another directory.
• Copy the files from the second bullet point to the clone of laminas/laminas-view.
• In your clone of laminas/laminas-view, commit the files, push to your fork, and open the new PR.
  We will be providing tooling via laminas/laminas-migration soon to help automate the process.