Initial skeleton: README, CVE inventory, roadmap, ARCH, ethics + copy_fail_family module absorbed from DIRTYFAIL

LICENSE

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+MIT License
+
+Copyright (c) 2026 DIRTYFAIL contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+---
+
+DISCLAIMER FOR SECURITY RESEARCH SOFTWARE
+
+This software is provided for authorized security research, education, and
+defensive testing only. By using this software, you agree that:
+
+1. You will only run the exploit modes (--exploit-*) on systems you own or
+   are explicitly authorized to test.
+2. You understand that the exploit modes modify the kernel page cache copy
+   of /etc/passwd and that this is a privilege-escalation operation while
+   it persists. The on-disk file is not modified.
+3. The authors disclaim all liability for any misuse of this software.