Support for execution costs per Hook APIs [DO NOT MERGE]

[tequdev]

High Level Overview of Change

Context of Change

require: #622

1. Allow custom costs to be set for each HookAPI, enabling more appropriate execution costs to be billed.
   (Currently, calling HookAPI incurs no additional cost and has the same cost as general Wasm instructions (1 drop))

2. HookDefinitionUpdate transaction added, allowing guard-checkers to be run on already deployed HookDefinitions.

3. Change the Hook execution fee format from sfFee/sfHookCallbackFee (STAmount) to sfHookCost/sfHookCallbackCost (uint64), allowing a more flexible and precise drop-based cost model instead of the previous fixed 1-drop-per-instruction structure.

Type of Change

• New feature (non-breaking change which adds functionality)
• Tests (you added tests for code that already exists, or your new feature included in this PR)

API Impact

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

[codecov]

Codecov Report

❌ Patch coverage is 81.10749% with 58 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.3%. Comparing base (c55420b) to head (4599fed).

Files with missing lines	Patch %	Lines
src/xrpld/app/tx/detail/HookDefinitionUpdate.cpp	0.0%	43 Missing ⚠️
include/xrpl/hook/Guard.h	88.9%	4 Missing ⚠️
src/xrpld/app/tx/detail/Transactor.cpp	90.5%	4 Missing ⚠️
src/xrpld/app/ledger/Ledger.cpp	86.7%	2 Missing ⚠️
src/xrpld/app/tx/detail/Change.cpp	71.4%	2 Missing ⚠️
include/xrpl/hook/Enum.h	66.7%	1 Missing ⚠️
src/xrpld/app/misc/FeeVoteImpl.cpp	96.4%	1 Missing ⚠️
src/xrpld/app/tx/detail/HookDefinitionUpdate.h	0.0%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             dev    #613     +/-   ##
=======================================
- Coverage   77.3%   77.3%   -0.0%     
=======================================
  Files        837     839      +2     
  Lines      78575   78816    +241     
  Branches   11551   11580     +29     
=======================================
+ Hits       60748   60923    +175     
- Misses     17817   17883     +66     
  Partials      10      10             

Files with missing lines	Coverage Δ
include/xrpl/hook/hook_api.macro	100.0% <100.0%> (ø)
include/xrpl/protocol/Fees.h	100.0% <ø> (ø)
include/xrpl/protocol/detail/ledger_entries.macro	100.0% <ø> (ø)
include/xrpl/protocol/detail/transactions.macro	100.0% <100.0%> (ø)
src/libxrpl/protocol/STValidation.cpp	81.8% <ø> (ø)
src/xrpld/app/hook/applyHook.h	80.3% <ø> (ø)
src/xrpld/app/hook/detail/applyHook.cpp	85.7% <100.0%> (+0.3%)	⬆️
src/xrpld/app/misc/NetworkOPs.cpp	66.6% <100.0%> (+0.2%)	⬆️
src/xrpld/app/tx/detail/SetHook.cpp	81.0% <100.0%> (-0.5%)	⬇️
src/xrpld/app/tx/detail/Transactor.h	94.1% <ø> (ø)
... and 11 more

... and 9 files with indirect coverage changes

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