chore: Clean up .gitignore and .gitattributes (XRPLF#6001)

The .gitignore and .gitattributes files contain references to files and directories that the current build no longer produces, so this change removes obsolete entries in these files, and does some general reorganizing of the remaining entries.

Author: bthomee

.gitattributes

@@ -1,10 +1,6 @@
 # Set default behaviour, in case users don't have core.autocrlf set.
 #* text=auto
 
-# These annoying files
-rippled.1 binary
-LICENSE binary
-
 # Visual Studio
 *.sln       text eol=crlf
 *.vcproj    text eol=crlf

.gitignore

@@ -1,69 +1,46 @@
 # .gitignore
 
-bin/boostbook_catalog.xml
-bin/config.log
-bin/project-cache.jam
-
-# Ignore vim swap files.
-*.swp
-
-# Ignore SCons support files.
-.sconsign.dblite
-
-# Ignore python compiled files.
-*.pyc
-
-# Ignore Macintosh Desktop Services Store files.
+# Macintosh Desktop Services Store files.
 .DS_Store
 
-# Ignore backup/temps
+# Build, intermediate, and temporary artifacts.
 *~
-
-# Ignore object files.
 *.o
-.nih_c
-tags
-TAGS
-GTAGS
-GRTAGS
-GPATH
-bin/rippled
-Debug/*.*
-Release/*.*
+*.pdb
+*.swp
+/.clangd
+Debug/
+Release/
+/.build/
+/build/
+/db/
+/out.txt
+/Testing/
+/tmp/
+CMakeSettings.json
+CMakeUserPresets.json
 
-# Ignore coverage files.
+# Coverage files.
 *.gcno
 *.gcda
 *.gcov
 
-# Levelization checking
+# Profiling data.
+gmon.out
+
+# Levelization data.
 .github/scripts/levelization/results/*
 !.github/scripts/levelization/results/loops.txt
 !.github/scripts/levelization/results/ordering.txt
 
-# Ignore tmp directory.
-tmp
-
-# Ignore database directory.
-db/
-db/*.db
-db/*.db-*
-
-# Ignore debug logs
-debug_log.txt
-
-# Ignore customized configs
-rippled.cfg
-validators.txt
+# Customized configs.
+/rippled.cfg
+/validators.txt
 
-# Doxygen generated documentation output
-HtmlDocumentation
-docs/html_doc
+# Locally patched Conan recipes
+external/conan-center-index/
 
-# Xcode user-specific project settings
-# Xcode
-.DS_Store
-/build/
+# XCode IDE.
 *.pbxuser
 !default.pbxuser
 *.mode1v3
@@ -76,41 +53,16 @@ xcuserdata
 profile
 *.moved-aside
 DerivedData
-.idea/
 *.hmap
 
-# Intel Parallel Studio 2013 XE
-My Amplifier XE Results - RippleD
-
-# Compiler intermediate output
-/out.txt
-
-# Build Log
-rippled-build.log
-
-# Profiling data
-gmon.out
-
-Builds/VisualStudio2015/*.db
-Builds/VisualStudio2015/*.user
-Builds/VisualStudio2015/*.opendb
-Builds/VisualStudio2015/*.sdf
-
-# MSVC
-*.pdb
-.vs/
-CMakeSettings.json
-compile_commands.json
-.clangd
-packages
-pkg_out
-pkg
-CMakeUserPresets.json
-bld.rippled/
-.vscode
+# JetBrains IDE.
+/.idea/
 
-# Suggested in-tree build directory
-/.build*/
+# Microsoft Visual Studio IDE.
+/.vs/
+/.vscode/
 
-# Locally patched Conan recipes
-external/conan-center-index/
+# AI tools.
+/.augment
+/.claude
+/CLAUDE.md