Added free-courses-te.md and courses (#8177)

* Added free-courses-te.md and courses

Added new file free-courses-te.md including course links

* Updated titles in free-courses-te.md

Updated all the titles of course links

courses/free-courses-te.md

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+### Index
+
+* [C](#c)
+* [C++](#cpp)
+* [Java](#java)
+* [Javascript](#javascript)
+* [Python](#python)
+* [R](#r)
+
+
+### C
+
+* [C Language Tutorials](https://www.youtube.com/playlist?list=PLC2mgeYbYNm-n8Iz-_3MuNsJFzr0UlGUu) - Telugu Computer World (YouTube)
+
+
+### <a id="cpp"></a>C++
+
+* [C++ Language Tutorials](https://www.youtube.com/playlist?list=PLC2mgeYbYNm9keJjsA95jKa4EUVLd7mQP) - Telugu Computer World (YouTube)
+
+
+### Java
+
+* [Full Java Tutorials in Telugu - Telugu Web Guru](https://www.youtube.com/playlist?list=PLh6Yk2rpZu2Lyt9-2hhRj37otchec1OJL) - (YouTube)
+
+
+### Javascript
+
+* [Full Java Script Tutorials in Telugu - Telugu Web Guru](https://www.youtube.com/playlist?list=PLh6Yk2rpZu2KqDjTuU_qHr-tI_CHOkIsN) - telugu web guru (YouTube)
+
+
+### Python
+
+* [Python in Telugu - Step by Step Tutorials](https://www.youtube.com/playlist?list=PLC2mgeYbYNm-3aTUq98pbmrA3P1_m-aJR) - Telugu Computer World (YouTube)
+
+
+### R
+
+* [R Programming Language Training Videos In telugu - R ట్రైనింగ్ వీడియోస్ ఇన్ తెలుగు R programming ట్రైనింగ్ వీడియోస్ ఇన్ తెలుగు](https://www.youtube.com/playlist?list=PLXx2-0oYp1LO9H8ciGQaTr6SN80dteTlc) - VLR Training (YouTube)
+