James Rodewig 7ef906fde8 [DOCS] Add tutorials section to analysis topic (#50809)
Adds a 'Configure text analysis' page to house tutorial content for the
analysis topic.

Also relocates the following pages as children as this new page:

* 'Test an analyzer'
* 'Configuring built-in analyzers'
* 'Create a custom analyzer'

I plan to add a tutorial for specifying index-time and search-time
analyzers to this section as part of a future PR.
2020-01-16 13:12:06 -05:00
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