Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/enet/.gitignore

@@ -0,0 +1,70 @@
+# Potential build directories
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+[Bb]in/
+[Dd]ebug/
+[Dd]ebugPublic/
+[Ll]og/
+[Ll]ogs/
+[Oo]bj/
+[Rr]elease/
+[Rr]eleases/
+[Ww][Ii][Nn]32/
+bld/
+build/
+builds/
+out/
+x64/
+x86/
+
+# VS 
+.vs/
+.vscode/
+!.vscode/extensions.json
+!.vscode/launch.json
+!.vscode/settings.json
+!.vscode/tasks.json
+
+# CMake
+_deps
+CMakeCache.txt
+CMakeFiles
+CMakeLists.txt.user
+CMakeScripts
+CMakeUserPresets.json
+CTestTestfile.cmake
+cmake_install.cmake
+compile_commands.json
+install_manifest.txt
+
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb