Add FFI routines for datafolder export

[t-b]

FFI_GetSweepBrowserTitles() returns a text wave with all sweep browser titles.

FFI_SavePSXDataFolderToHDF5 takes a full filepath to a non-existing file and a sweep browser title. It will then save all psx datafolders it can find in it.

[timjarsky]

@t-b with

FFI_SavePSXDataFolderToHDF5("C:\\Users\\timj\\Downloads", "Browser")

I get:

FFI_SavePSXDataFolderToHDF5("C:\Users\timj\Downloads", "Browser")
  !!! Assertion FAILED !!!
  Message: "Could not find SweepBrowser with given title: Browser"
  Please provide the following information if you contact the MIES developers:
  ################################
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Stacktrace:
  FFI_SavePSXDataFolderToHDF5(...)#L195 [MIES_ForeignFunctionInterface.ipf]
AB_GetSweepBrowserWindowFromTitle(...)#L3276 [MIES_AnalysisBrowser.ipf]
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Time: 2025-06-09T10:08:19-07:00
  Locked device: [- none -]
  Current sweep: [- none -]
  DAQ: [- none -]
  Testpulse: [- none -]
  Acquisition state: [- none -]
  Experiment: 2022_07_29_120535_v1 (Packed)
  Igor Pro version: 9.0.6.1 (56565)
  MIES version:
  Release_2.9_20250502-135-g9bc5d8922
Date and time of last commit: 2025-06-06T19:12:23+02:00
Submodule status: 
-f7e1cfa52796165f589ab628174a0c4307459b92 Packages/IPNWB
-7dece9a54731855b702ee6002650af72e8a3daa4 Packages/doc/doxygen-filter-ipf
-af3d04fa8c3caf7a85b11ea22bc22018c774b77c Packages/igortest
  ################################

I confirmed the window title:

•getwindow kwTopWin, title
•print s_value
Browser 

I also tried:

•FFI_SaveDataFolderToHDF5("C:\Users\timj\Downloads", "root:sweepBrowser:FormulaData:psx:")
While executing HDF5CreateFile, H5Fcreate failed.
While executing HDF5CreateFile, H5Fcreate failed.
  HDF5 library function H5FD__sec2_open(): unable to open file: name = 'C:\Users	imj\Downloads', errno = 22, error message = 'Invalid argument', flags = 15, o_flags = 502
  HDF5 library function H5FD_open(): open failed
  HDF5 library function H5F_open(): unable to open file: time = Mon Jun  9 10:11:25 2025
, name = 'C:\Users	imj\Downloads', tent_flags = 15
  HDF5 library function H5Fcreate(): unable to create file
•FFI_SaveDataFolderToHDF5("C:\\Users\\timj\\Downloads", "root:sweepBrowser:FormulaData:psx:")
While executing HDF5CreateFile, H5Fcreate failed.
While executing HDF5CreateFile, H5Fcreate failed.
  HDF5 library function H5FD__sec2_open(): unable to open file: name = 'C:\Users\timj\Downloads', errno = 13, error message = 'Permission denied', flags = 15, o_flags = 502
  HDF5 library function H5FD_open(): open failed
  HDF5 library function H5F_open(): unable to open file: time = Mon Jun  9 10:12:10 2025
, name = 'C:\Users\timj\Downloads', tent_flags = 15
  HDF5 library function H5Fcreate(): unable to create file
  
  ```

[t-b]

Added an assertion so that we catch cases where users pass a folder

[t-b]

Of course we can also change it to allow passing a folder, we figure a file name and return that. No problem.