another strtrim test

[iggi42]

I learned that strtrim should only remove characters of the given set at the end and start of the input string.
This tester lacked a test to catch that misunderstanding, so here have one.

[iggi42]

woops, that was meant to go another branch.

[Copilot]

Pull request overview

This PR adds a test case for ft_strtrim to verify it only removes characters from the given set at the start and end of the input string, not from the middle. Additionally, it fixes file permission issues in file creation calls and updates build configuration paths and compiler flags.

• Added a new test case for ft_strtrim to ensure characters are only trimmed from string boundaries
• Fixed missing file permission mode in open() calls across multiple test files
• Updated LIBFT_PATH to point to a subdirectory and added compiler flag to suppress unused result warnings

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/ft_strtrim_test.cpp	Added test case verifying trim-only-at-boundaries behavior
tests/ft_putstr_fd_test.cpp	Added missing file permissions (0600) to open() call
tests/ft_putendl_fd_test.cpp	Added missing file permissions (0600) to open() call
tests/ft_putchar_fd_test.cpp	Added missing file permissions (0600) to open() call
Makefile	Updated library path to subdirectory and added compiler warning suppression flag

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[Tripouille]

Could you please update this PR by including only the scenario you want to add as changes? Thanks.