added robots.txt for API endpoints

[MysteryManav]

Fixes

• Added robots.txt file

Fixes #3060 by @dhruvkb

Description

• Added robots.txt file to the api/templates folder

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• I ran the DAG documentation generator (if applicable).

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@dhruvkb @obulat

[dhruvkb]

@MysteryManav you should also add your previous changes to urls/__init__.py to this PR.

Also you can update the PR by pushing more commits to the same branch, you don't need to close your existing PR and create a separate PR for each change.

[MysteryManav]

@dhruvkb done, sorry i had to clone the repo again due to some problems on my side, so i forgot to redo the changes, should be fine now

[dhruvkb]

LGTM, except for a minor nit.

[dhruvkb]

I don't know if there should be a trailing slash for a .txt file. I'm leaning towards no, there shouldn't be one.

Suggested change

	"robots.txt/",
	"robots.txt",

I'll let the other reviewers chime in on that.

[MysteryManav]

ok will keep that in mind

[obulat]

Thank you for your contribution, @MysteryManav! 🎉