Regex pattern for include fails to catch slash

[hansolsuh]

Describe the bug

1. Regex pattern issue
   I was trying to use #include "petsc/finclude/petscvec.h", but fortls couldn't not find it despite the correct dir locations. After doing some pdb walkthrough, I found that, at regex_patterns.py:133, has a "missing" slash. With the above line, the output was "petsc, when it should've been "petsc/finclude/petscvec.h"`.

I was able to get around this issue by adding a slash in the regex patter, via
[ ]*#[ ]*include[ ]*([\"\w\./]*)

Now, if I paste the original regex pattern into a separate python file, say, myexample.py, the original pattern does spit out "petsc/finclude/petscvec.h", but in the actual fortls code, it does not. Also, if I try it on pythex.org, the original pattern only gives `"petsc".

I tried it on both Ubuntu 22.04.5 LTS + Intel(R) Xeon(R) Gold 5317 CPU @ 3.00GHz, Python 3.10.12, and
M1 Macbook Air, Pthon 3.10.14.

Anyway, I got my fortran + petsc to work via that fix - wasn't sure whether you do not want regex for slash or not.

Thanks.

To Reproduce
Try and reproduce the fortls error through the debug interface, for more see fortls --debug_help. Usually debug requests start like fortls --debug_filepath your_file.f90 --debug_rootpath . ....

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Setup information (please complete the following information):

• OS: [e.g. Linux, Mac]
• Python Version [e.g. 3.10]
• fortls Version [e.g. 2.3]
• Code editor used [e.g. VS Code, Vim]
• the Fortran extension for the code editor and its version [e.g. Modern Fortran v3.0.0] (if applicable)

Configuration information (please complete the following information):

• Your .fortlsrc or .fortls.json or .fortls configuration file OR any other JSON config being used (if any)
• Any settings specified through your extension [e.g. for VS Code settings from settings.json]

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