Improve DotenvType to accept str

[hramezani]

Fixes first error reported in #95

test.py:4: error: Incompatible types (expression has type "str", TypedDict item "env_file" has type "Path | list[Path] | tuple[Path, ...] | None")  [typeddict-item]

Selected Reviewer: @samuelcolvin

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (107e8de) 97.42% compared to head (96ecb61) 97.42%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #96   +/-   ##
=======================================
  Coverage   97.42%   97.42%           
=======================================
  Files           5        5           
  Lines         311      311           
  Branches       68       68           
=======================================
  Hits          303      303           
  Misses          6        6           
  Partials        2        2           

Impacted Files	Coverage Δ
pydantic_settings/sources.py	97.70% <100.00%> (ø)

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[hramezani]

please review

[Kludex]

We don't test these?

[hramezani]

We don't test these?

We have some tests that include the string env_file in the config.

Which kind of tests do you mean?

[Kludex]

We don't test these?

We have some tests that include the string env_file in the config.

Which kind of tests do you mean?

Any test that would avoid a regression here. 👀

[hramezani]

We don't test these?

We have some tests that include the string env_file in the config.
Which kind of tests do you mean?

Any test that would avoid a regression here. 👀

It's a mypy error and we don't have mypy tests here.

test.py:4: error: Incompatible types (expression has type "str", TypedDict item "env_file" has type "Path | list[Path] | tuple[Path, ...] | None") [typeddict-item]