Decouple app/tx with Application and Config

[a1q123456]

High Level Overview of Change

This PR decouples app/tx with Application and Config to clear the way to moving transactors to libxrpl.

This PR is part of the modularisation of the transactors. See all PRs here:
#6222
#6223
#6224
#6225
#6226
#6227
#6228

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Performance (increase or change in throughput and/or latency)
• Tests (you added tests for code that already exists, or your new feature included in this PR)
• Documentation update
• Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)
• Release

[codecov]

Codecov Report

❌ Patch coverage is 96.90722% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.2%. Comparing base (883d0d6) to head (0595bec).

Files with missing lines	Patch %	Lines
src/xrpld/app/misc/NetworkOPs.cpp	50.0%	1 Missing ⚠️
src/xrpld/app/tx/detail/Change.cpp	75.0%	1 Missing ⚠️
src/xrpld/overlay/detail/PeerImp.cpp	0.0%	1 Missing ⚠️

Additional details and impacted files

@@                                    Coverage Diff                                     @@
##           a1q123456/modularise-hashrouter-conditions-and-orderbookdb   #6227   +/-   ##
==========================================================================================
  Coverage                                                        79.2%   79.2%           
==========================================================================================
  Files                                                             845     848    +3     
  Lines                                                           71719   71736   +17     
  Branches                                                         8277    8282    +5     
==========================================================================================
+ Hits                                                            56816   56841   +25     
+ Misses                                                          14903   14895    -8     

Files with missing lines	Coverage Δ
include/xrpl/core/NetworkIDService.h	100.0% <100.0%> (ø)
include/xrpl/core/ServiceRegistry.h	100.0% <ø> (ø)
src/xrpld/app/ledger/detail/BuildLedger.cpp	92.0% <100.0%> (+0.3%)	⬆️
src/xrpld/app/ledger/detail/OpenLedger.cpp	70.6% <100.0%> (ø)
src/xrpld/app/main/Application.cpp	69.0% <100.0%> (+0.1%)	⬆️
src/xrpld/app/main/Application.h	100.0% <ø> (ø)
src/xrpld/app/misc/detail/TxQ.cpp	97.7% <100.0%> (+<0.1%)	⬆️
src/xrpld/app/tx/applySteps.h	100.0% <ø> (ø)
src/xrpld/app/tx/detail/AMMCreate.cpp	92.0% <100.0%> (ø)
src/xrpld/app/tx/detail/ApplyContext.cpp	100.0% <100.0%> (ø)
... and 29 more

... and 3 files with indirect coverage changes

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