pyQt examples - error with Content search

[mickaelbegon]

When running python -m bioptim.examples
and choosing "Content search"
error message:

Traceback (most recent call last):
File "/Users/mickaelbegon/Documents/GIT/bioptim/bioptim/examples/main.py", line 576, in filterByContent
contents = self.getExampleContent(filename).lower()
File "/Users/mickaelbegon/Documents/GIT/bioptim/bioptim/examples/main.py", line 703, in getExampleContent
with open(filename, "r") as currentFile:
FileNotFoundError: [Errno 2] No such file or directory: '/Users/mickaelbegon/Documents/GIT/bioptim/acados/static_arm.py'

[mickaelbegon]

I opened draft PR #1068. Content search now preserves nested example directories and resolves files from the bioptim/examples module directory instead of os.getcwd(). The regression test verifies that every declared example path exists and passes locally, and git diff --check is clean. @pariterre, the implementation is working locally and ready for review; CI is running on the PR.