refactor: Rename system name from 'ripple' to 'xrpld'

[bthomee]

High Level Overview of Change

This change modifies the system name from rippled to xrpld.

Context of Change

Per XLS-0095, we are taking steps to rename ripple(d) to xrpl(d).

This change renames the system name, which is used in limited places:

• When no explicit config file is passed via the --config flag, then the system name is used to construct the path where the config file and database may be stored, via the $XDG_CONFIG_HOME and $XDG_DATA_HOME directories, respectively.
• It is used in the metadata and user-agent as part of RPC calls.
• It is newly used in the full version string.

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

[Copilot]

Pull request overview

This PR updates the core “system name” constant used across xrpld for default config/data directory selection (XDG + /etc/opt//var/opt) and for RPC metadata/user-agent strings, aligning with the ongoing rename effort in XLS-0095.

Changes:

• Update systemName() from "ripple" to "xrpld".

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[godexsoft]

Not an issue for Clio 👍
May be an issue for someone else but i very much doubt.

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@47a235b). Learn more about missing BASE report.
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/xrpld/app/main/Main.cpp	0.0%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             develop   #6347   +/-   ##
=========================================
  Coverage           ?   79.8%           
=========================================
  Files              ?     878           
  Lines              ?   67894           
  Branches           ?    7555           
=========================================
  Hits               ?   54201           
  Misses             ?   13693           
  Partials           ?       0           

Files with missing lines	Coverage Δ
include/xrpl/protocol/SystemParameters.h	100.0% <100.0%> (ø)
src/libxrpl/protocol/BuildInfo.cpp	98.4% <100.0%> (ø)
src/xrpld/rpc/detail/ServerHandler.cpp	87.8% <100.0%> (ø)
src/xrpld/app/main/Main.cpp	77.8% <0.0%> (ø)

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[legleux]

Just the Copilot suggestion so we don't get xrpldd in certain places.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

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