Fix issue #59 pre-defined bosonic channels

[abhimanyuiitk22]

Hi,
I have implemented a classical noise channel and a thermal channel from ref https://arxiv.org/pdf/quant-ph/0505151 sec 2.2.

@apkille and @Krastanov, whenever you have time, could you please review it and let me know if any changes are needed?

Thanks

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	ef05243...	main / ef05243...
operations/channel product/10	4.61 ± 0.67 μs	4.48 ± 0.72 μs	1.03 ± 0.22
operations/channel product/100	0.758 ± 0.11 ms	0.772 ± 0.044 ms	0.982 ± 0.15
operations/channel product/2	1.23 ± 0.06 μs	1.11 ± 0.09 μs	1.11 ± 0.1
operations/channel product/200	3.82 ± 1.1 ms	3.82 ± 0.47 ms	1 ± 0.31
operations/channel product/50	0.252 ± 0.016 ms	0.25 ± 0.015 ms	1.01 ± 0.087
operations/partial trace/10	1.25 ± 0.18 μs	1.17 ± 0.19 μs	1.07 ± 0.23
operations/partial trace/100	9.68 ± 1.3 μs	9.72 ± 2.5 μs	0.995 ± 0.29
operations/partial trace/2	0.942 ± 0.061 μs	0.852 ± 0.059 μs	1.11 ± 0.1
operations/partial trace/200	22.1 ± 2.7 μs	30.2 ± 3.3 μs	0.731 ± 0.12
operations/partial trace/50	4.98 ± 1.2 μs	4.45 ± 0.88 μs	1.12 ± 0.35
operations/tensor product/10	1.98 ± 0.61 μs	1.9 ± 0.59 μs	1.04 ± 0.46
operations/tensor product/100	0.127 ± 0.019 ms	0.13 ± 0.015 ms	0.975 ± 0.18
operations/tensor product/2	0.862 ± 0.031 μs	0.781 ± 0.03 μs	1.1 ± 0.058
operations/tensor product/200	0.8 ± 0.25 ms	0.745 ± 0.08 ms	1.07 ± 0.35
operations/tensor product/50	26.2 ± 3.8 μs	25.5 ± 2.6 μs	1.03 ± 0.18
operations/unitary product/10	3.72 ± 0.45 μs	3.79 ± 0.48 μs	0.982 ± 0.17
operations/unitary product/100	0.721 ± 0.03 ms	0.73 ± 0.025 ms	0.987 ± 0.053
operations/unitary product/2	1.14 ± 0.05 μs	1.05 ± 0.05 μs	1.09 ± 0.07
operations/unitary product/200	3.74 ± 0.12 ms	3.73 ± 0.18 ms	1 ± 0.059
operations/unitary product/50	0.232 ± 0.011 ms	0.233 ± 0.011 ms	0.995 ± 0.066
time_to_load	0.216 ± 0.0012 s	0.222 ± 0.0021 s	0.974 ± 0.011

Memory benchmarks

	main	ef05243...	main / ef05243...
operations/channel product/10	17 allocs: 10.2 kB	17 allocs: 10.2 kB	1
operations/channel product/100	17 allocs: 0.919 MB	17 allocs: 0.919 MB	1
operations/channel product/2	14 allocs: 0.891 kB	14 allocs: 0.891 kB	1
operations/channel product/200	19 allocs: 3.67 MB	19 allocs: 3.67 MB	1
operations/channel product/50	17 allocs: 0.231 MB	17 allocs: 0.231 MB	1
operations/partial trace/10	14 allocs: 0.672 kB	14 allocs: 0.672 kB	1
operations/partial trace/100	15 allocs: 2.79 kB	15 allocs: 2.79 kB	1
operations/partial trace/2	14 allocs: 0.672 kB	14 allocs: 0.672 kB	1
operations/partial trace/200	15 allocs: 5.04 kB	15 allocs: 5.04 kB	1
operations/partial trace/50	14 allocs: 1.69 kB	14 allocs: 1.69 kB	1
operations/tensor product/10	9 allocs: 13.1 kB	9 allocs: 13.1 kB	1
operations/tensor product/100	10 allocs: 1.22 MB	10 allocs: 1.22 MB	1
operations/tensor product/2	8 allocs: 0.797 kB	8 allocs: 0.797 kB	1
operations/tensor product/200	10 allocs: 4.89 MB	10 allocs: 4.89 MB	1
operations/tensor product/50	9 allocs: 0.307 MB	9 allocs: 0.307 MB	1
operations/unitary product/10	14 allocs: 6.95 kB	14 allocs: 6.95 kB	1
operations/unitary product/100	14 allocs: 0.614 MB	14 allocs: 0.614 MB	1
operations/unitary product/2	12 allocs: 0.688 kB	12 allocs: 0.688 kB	1
operations/unitary product/200	16 allocs: 2.45 MB	16 allocs: 2.45 MB	1
operations/unitary product/50	14 allocs: 0.155 MB	14 allocs: 0.155 MB	1
time_to_load	0.145 k allocs: 11 kB	0.145 k allocs: 11 kB	1