[FEAT] Add Thin Lens formula for ray optics (#7170)

* [FEAT] Add Thin Lens formula for ray optics

* [CI] Re-run clang-format checks

* [CI] Re-run checks after rebase

* [STYLE] Apply clang-format to ThinLensTest

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Co-authored-by: Koushik Sai <nyamathabadkoushik@gmail.com>