Add the panasonic rx-ds750 remote

[bepvte]

Picked up this 3 disc stereo system and was lucky enough for it to come with a remote

[github-actions]

Thank you for your contribution! ❤️

We use an automated linter to ensure consistency. During the review of the .ir files in your pull request, it found the following issue(s):

🐛 Linter Result (Click to open)

CD_Players/Panasonic/Panasonic_RXDS750.ir [1 issues]

# Line 32:
- command: 5C 00 00 00#
                      ^
@@ character not allowed here (non-HEX) @@

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Please address these issues and update your pull request. Once the problems are resolved, the linter will re-check your changes.