Updated the loadmuonnexus1 loader to read period information. Created a new widget for the period information. Need to deal with what happens when information cannot be found

Runs clang-tidy pass by ref across the codebase to fix-up various
warnings we are seeing in cppcheck

Signed-off-by: Steven Hahn <hahnse@ornl.gov>

Also updated class_maker.py

This commit replaces all header guards in DataHandling with #pragma once

Update copyright headers in all files

Squashed commit of the following:

* First version of a script to manage copyright statements

re #23468

* Neatened up script, added comments

re #23488

* move script to tools directory

re #23488

* small script changes and a couple of manual file changes

re #23488

* Minor chnage to whitespace detection in regex

re #23488

* Add an excluded directory

re #23488

* remove a repeasted copyright statement in a file

re #23488

* Don't comsume the comment end if it is on the same line

re #23488

* fix error in new copright parsing

re #23488

* remove double copyrifght entry

re #23488

* Improve handling of old copyrights at the start of comments

re #23488

* remove empty comments re #23488

* exclude gsoapgenerated directories

re #23488

* Sort out greedy line matching re #23488

* improve empty comment removal

re #23488

* improve false positives

re #23488

* impressive speedup by limiting regex matching length

re #23488

* remove evil invisible non ascii character

Also upadte the copyright at the same time

re #23488

* resolve multiple copyrights in a single file

re #23488

* resolve an issue with new statement detection

re #23488

* another unprintable unicode character

re #23488

* pep updates and cmake the new copyright fit clang format

re #23488

* update already done new format headers

re #23488

* wrong type of bracket

re #23488

* Update class_maker and friends

re #23488

* Update all copyright statements

re #23488

* clang format re #23488

* flake8 warnings re #23488

* Flake8 warnings re #23488

* Exclude .cmake.in and rb.in files

re #23488

* replace missing line re #23488

* exclude .py.in files as they are flasely recognized as C++

re #23488

* another setp.py.in re #23488

* another .py.in correction re #23488

* Hopefully the last of the .py.in files re #23488

* resolve utf-8 encoding of python files and changed ABINS checksum

re #23488

* updates to unit tests that reference line numbers

re #23488

* remaining unit test files and other fixes

re #23488

If the NeXus file has no grouping or zero grouping, load the grouping
from the IDF. If this fails too, use a dummy grouping. In either case,
log a warning message.

This enables the use of such files in the ALC interface, and means the
behaviour is the same as in MuonAnalysis.

re #14085

re #15450

re #8840

Fixing DataHandling, Kernel, MDAlgorithms, MDEvents and Nexus.

This avoids having to declare a new interface when a new loader type
is added.

* Rename HDFDescriptor to NexusDescriptor
* Rename {HDF,NonHDF} -> {Nexus,Generic} in FileLoaderRegistry
* Rename DECLARE_HDF_FILELOADER_ALGORITHM ->
  DECLARE_NEXUS_FILELOADER_ALGORITHM

Refs #7461

This will be put back again once all the nexus kits are in sync.
I have created a ticket for this - refs #4179

Refs #3724: Pulled wiki description text from the wiki site and added in algorithms' header file with special tags. The auto_wiki.py script can retrieve the text to generate the wiki page fully.

Fixed tests outside NeXus/DataHandling that relied on loading data
Had to add Nexus as a link dependency for various package Test targets - don't know why!
refs #2822