Restore config README files accidentally removed during testing

Author: Copilot

config/Readme.md

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+## Config
+
+All config files must be in this folder. If there is no option to set this folder 
+directly, it has to be hardlinked.
+
+* `user_aliases.cmd`: aliases in cmd; called from vendor\init.bat; autocreated from
+  `vendor\user_aliases.cmd.default`.
+* `*.lua`: clink completions and prompt filters; autoloaded after all
+  prompt filter and clink completions are initialized; add your own.
+* `user_profile.{sh|cmd|ps1}`: startup files for bash|cmd|powershell tasks; called from their
+  respective startup scripts in `vendor\`; autocreated from
+  `vendor\user_profile.{sh|cmd|ps1}.default` on first start of such a task.
+* `.history`: the current commandline history; autoupdated on close.
+* `settings`: settings for readline; overwritten on update.
+* `user-ConEmu.xml`: settings from ConEmu the UI of Cmder. ;
+  Do not edit this file directly it is overwritten on each cmder.exe launch.

config/profile.d/README.md

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+## Profile.d Folder
+
+* Files in this folder named `*.{sh|cmd|ps1}`: Will be executed by the appropriate shell when starting the shell.