Merge pull request #25042 from mshabunin:doc-upgrade

Documentation transition to fresh Doxygen #25042

* current Doxygen version is 1.10, but we will use 1.9.8 for now due to issue with snippets (https://github.com/doxygen/doxygen/pull/10584)
* Doxyfile adapted to new version
* MathJax updated to 3.x
* `@relates` instructions removed temporarily due to issue in Doxygen (to avoid warnings)
* refactored matx.hpp - extracted matx.inl.hpp
* opencv_contrib - https://github.com/opencv/opencv_contrib/pull/3638

doc/tutorials/introduction/clojure_dev_intro/clojure_dev_intro.markdown

@@ -35,11 +35,11 @@ issue the following command to run the sample from the command line.
 cd path/to/samples/java/clojure/simple-sample
 lein run
 @endcode
+
 Preamble
 --------
 
-For detailed instruction on installing OpenCV with desktop Java support refer to the @ref tutorial_java_dev_intro "corresponding
-tutorial".
+For detailed instruction on installing OpenCV with desktop Java support refer to the @ref tutorial_java_dev_intro "corresponding tutorial".
 
 If you are in hurry, here is a minimum quick start guide to install OpenCV on Mac OS X:
 
@@ -63,6 +63,7 @@ make -j8
 # optional
 # make install
 @endcode
+
 Install Leiningen
 -----------------
 
@@ -170,6 +171,7 @@ i386     -> x86
 arm      -> arm
 sparc    -> sparc
 @endcode
+
 ### Package the native lib as a jar
 
 Next you need to package the native lib in a jar file by using the jar command to create a new jar
@@ -193,6 +195,7 @@ tree
 
 3 directories, 3 files
 @endcode
+
 ### Locally install the jars
 
 We are now ready to add the two jars as artifacts to the local maven repository with the help of the
@@ -402,6 +405,7 @@ Let's now try to port to Clojure the @ref tutorial_java_dev_intro "OpenCV Java t
 Instead of writing it in a source file we're going to evaluate it at the REPL.
 
 Following is the original Java source code of the cited sample.
+
 @code{.java}
 import org.opencv.core.Mat;
 import org.opencv.core.CvType;
@@ -430,20 +434,25 @@ Before start coding, we'd like to eliminate the boring need of interactively loa
 opencv lib any time we start a new REPL to interact with it.
 
 First, stop the REPL by evaluating the (exit) expression at the REPL prompt.
+
 @code{.clojure}
 user=> (exit)
 Bye for now!
 @endcode
+
 Then open your project.clj file and edit it as follows:
+
 @code{.clojure}
 (defproject simple-sample "0.1.0-SNAPSHOT"
   ...
 injections [(clojure.lang.RT/loadLibrary org.opencv.core.Core/NATIVE_LIBRARY_NAME)])
 @endcode
+
 Here we're saying to load the opencv native lib anytime we run the REPL in such a way that we have
 not anymore to remember to manually do it.
 
 Rerun the lein repl task
+
 @code{.bash}
 lein repl
 nREPL server started on port 51645 on host 127.0.0.1
@@ -458,11 +467,14 @@ Clojure 1.5.1
 
 user=>
 @endcode
+
 Import the interested OpenCV java interfaces.
+
 @code{.clojure}
 user=> (import '[org.opencv.core Mat CvType Scalar])
 org.opencv.core.Scalar
 @endcode
+
 We're going to mimic almost verbatim the original OpenCV java tutorial to:
 
 -   create a 5x10 matrix with all its elements initialized to 0