Avoid dependency on the SmallGrp package

[fingolfin]

HeLP uses CharacterTable(SmallGroup(1,1)) as the initial value of the global variable HeLP_CT, in two places:

• lib/HeLP_internal_no_solving.gi:5, which is executed at load time
• lib/HeLP_no_solving.gi:54, inside HeLP_Reset

Because of the first one, HeLP cannot even be loaded when the SmallGrp package is unavailable:

gap> LoadPackage("help");
Error, the Small Groups library is required but not installed

SmallGroup(1,1) is just the trivial group, so this replaces both uses with TrivialGroup(). That is likewise a pc group, and the two character tables agree on Irr, OrdersClassRepresentatives and ClassNames. The documentation of HeLP_Reset is updated accordingly.

With this change HeLP no longer uses any function from SmallGrp, PrimGrp or TransGrp.

Testing

• gap --bare -c 'LoadPackage("GAPDoc");' + LoadPackage("help" : OnlyNeeded) + TestPackage("help") — now passes; previously failed at load.
• Normal run with full package autoload — passes, no differences.
• HeLP_Reset additionally exercised by hand; it is also covered by tst/no_solver.tst.

Context

This comes out of gap-system/gap#2434, which aims to make GAP and its packages work when PrimGrp/SmallGrp/TransGrp are not installed. HeLP showed up in a PackageDistro CI experiment that runs package test suites under gap --bare.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.91%. Comparing base (df5ee28) to head (159eaa3).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #30   +/-   ##
=======================================
  Coverage   67.91%   67.91%           
=======================================
  Files           7        7           
  Lines        2537     2537           
=======================================
  Hits         1723     1723           
  Misses        814      814           

Files with missing lines	Coverage Δ
lib/HeLP.gd	100.00% <ø> (ø)
lib/HeLP_internal_no_solving.gi	79.96% <100.00%> (ø)
lib/HeLP_no_solving.gi	48.80% <100.00%> (ø)

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[fingolfin]

@margollo would be great to have this in a new package release :-)

[margollo]

Will be included, thanks!