[enhancement] add dlpack support to to_table

.github/.licenserc.yaml

@@ -65,7 +65,8 @@ header:
     # Specific files
     - 'setup.cfg'
     - 'LICENSE'
-
+    # External copies of copyrighted work
+    - 'onedal/datatypes/dlpack/dlpack.h'
   comment: never
 
   license-location-threshold: 80 # specifies the index threshold where the license header can be located.

doc/third-party-programs-sklearnex.txt

@@ -242,7 +242,7 @@ DAMAGE.
 -------------------------------------------------------------
 
 3. Cython
-Apache License
+                                 Apache License
                            Version 2.0, January 2004
                         https://www.apache.org/licenses/
 
@@ -421,4 +421,209 @@ Apache License
 
 -------------------------------------------------------------
 
+4. DLPack
+                                Apache License
+                           Version 2.0, January 2004
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+
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+-------------------------------------------------------------
+
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