add manual for Intech TEK2

source/hardware/controllers/intech_TEK2.rst

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+Intech Studio - Grid (TEK2)
+===========================
+
+-  `Intech Studio <https://intech.studio/>`__
+
+.. versionadded:: 2.4
+
+TEK2 and Scratch
+----------------
+
+This simple configuration is created for the Intech Studio `TEK2 module <https://intech.studio/shop/tek2>`__, 
+enabling the use of the Jogwheel and Scratch functionality in MIXXX software. 
+Our Grid modules are modular and fully configurable, allowing you to create your own DJ MIDI controller.
+We typically use the `TEK2 <https://intech.studio/shop/tek2>`__, `PBF4 <https://intech.studio/shop/pbf4>`__, and `PO16 <https://intech.studio/shop/po16>`__ modules, which together form a straightforward combination to control any DJ software. 
+However, everyone's needs and ideas for plug together Grids are different, 
+so creating custom mappings in MIXXX is entirely up to you—it's really easy!
+
+Setting up the controller
+-------------------------
+
+To make this mapping work, follow these settings:
+
+1. Download and open the `Grid Editor <https://intech.studio/ae/products/grid-editor/>`__.
+2. In the Grid Editor, access the Profile Cloud where you can load and save configurations to our Modules.
+3. Search for 'TEK2 DJ setup', then load and store it to your TEK2.
+4. Open up MIXXX, go to Preferences/Controllers, and select the 'Intech TEK2' profile.
+
+That's it! You are now able to use the jog wheel and create your custom mapping.
+
+
+If you have any questions or need help with the setup, 
+join our `Discord channel <https://discord.com/invite/ntrzhxS>`__
+and we will assist you!
+
+
+.. figure:: ../../_static/controllers/intech_dj.png
+   :align: center
+   :width: 100%
+   :figwidth: 100%
+   :alt: Intech DJ (schematic view)
+   :figclass: pretty-figures
+
+   TEK2, PBF4 and PO16
+
+
+
+