fix: added application/pdf response parsing to FunctionsClient.ts

[PhilippS93]

What kind of change does this PR introduce?

fixes supabase/supabase#18175

What is the current behavior?

Please link any relevant issues here.

What is the new behavior?

Feel free to include screenshots if it includes visual changes.

Additional context

Add any other context or screenshots.

[coveralls]

Pull Request Test Coverage Report for Build 6531473143

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 91.739%

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Totals
Change from base Build 6143028547:	0.0%
Covered Lines:	185
Relevant Lines:	197

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💛 - Coveralls

[kamilogorek]

Related #70

[MariusWilsch]

Why is nobody pushing this. It's end of 2024 and this is still the same issue!

[cohlar]

Why is nobody pushing this. It's end of 2024 and this is still the same issue!

I'm not familiar with the dev decisions, I just know this solution is quite "partial" in the sense there are a lot of file types beyond pdf that would need a similar treatment. e.g. all the .docx, .xlsx, .pptx files (I'm sure that's just the tip of the iceberg).

[mandarini]

moved here: supabase/supabase-js#1757