Float8 / BFloat16

• Add IR types for Float8 (e4m3) and BFloat16.
• Add cases to enough matches to compile. There may be more with _ => panic!(... or equivalent that will only be ran into when trying to compile real code.
• TODO: maybe add Float8 and BFloat16 constants? I hope we don't need this...
• Closes #20 (closed).

requested review from @ryanjz2

assigned to @rarbore2

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added 3 commits

• 0039d6a8...16d655ac - 2 commits from branch main
• eb2862dd - fp8/16

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• 8adcdc54 - Add fp8 and bf16 to Juno

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added 13 commits

• 8adcdc54...f60f3aee - 12 commits from branch main
• a2368fbf - Merge branch 'main' into fp_types

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• 53d32114 - fixes

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marked this merge request as ready

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• 412a58ac - hm what gpus are fp8 supported on?

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merged

mentioned in commit f9302091