Serbian (#819)

* Serbian language: dictionary + icons

* updated icon generation script

docs/dictionaries/srWordlistReadme.txt

@@ -0,0 +1,21 @@
+Serbian word list by: Jovan Turanjanin
+Version: aa2d0308ee633d22b4b663d90507bf2747a6399c (2022-06-29)
+Source: https://github.com/turanjanin/spisak-srpskih-reci
+License: (CC0 1.0 Universal) https://github.com/turanjanin/spisak-srpskih-reci/blob/master/LICENSE.md
+
+Serbian word frequencies by: CC-100
+Version: 2020
+Source: https://data.statmt.org/cc-100/
+References (PDF links are available in the source URL):
+    - Unsupervised Cross-lingual Representation Learning at Scale, Alexis Conneau, Kartikay Khandelwal, Naman Goyal, Vishrav Chaudhary, Guillaume Wenzek, Francisco Guzmán, Edouard Grave, Myle Ott, Luke Zettlemoyer, Veselin Stoyanov, Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics (ACL), p. 8440-8451, July 2020.
+    - CCNet: Extracting High Quality Monolingual Datasets from Web Crawl Data, Guillaume Wenzek, Marie-Anne Lachaux, Alexis Conneau, Vishrav Chaudhary, Francisco Guzmán, Armand Joulin, Edouard Grave, Proceedings of the 12th Language Resources and Evaluation Conference (LREC), p. 4003-4012, May 2020.
+
+More Serbian word frequencies from The Leipzig Corpora Collection:
+Source: https://wortschatz.uni-leipzig.de/en/download/Serbian
+Version: Web/2016/1M, Wikipedia/2021/1M
+License: https://creativecommons.org/licenses/by-nc/4.0/
+
+Yet even more word frequencies obtained from LatinIME dictionaries:
+Source: https://android.googlesource.com/platform/packages/inputmethods/LatinIME
+Version: 66093bf509ea92fa31d796326d5f30a8d9582ffe (2023-12-21)
+License: https://android.googlesource.com/platform/packages/inputmethods/LatinIME/+/refs/heads/main/NOTICE