Merge pull request #22045 from victor1234:calib3d-fisheye-model-reference

* Add fisheye camera model summary description with reference

* Fix layout

* Move reference to bibtex

doc/opencv.bib

@@ -1292,3 +1292,13 @@
   publisher={IEEE},
   doi = {10.1109/TPAMI.2021.3055337}
 }
+@article{Kannala2006,
+  author = {Kannala, Juho and Brandt, Sami},
+  year = {2006},
+  month = {09},
+  pages = {1335-40},
+  title = {A Generic Camera Model and Calibration Method for Conventional, Wide-Angle, and Fish-Eye Lenses},
+  volume = {28},
+  journal = {IEEE transactions on pattern analysis and machine intelligence},
+  doi = {10.1109/TPAMI.2006.153}
+}