chore(v-ecosystem): move panic-attack V-lang API binding here

V-lang banned estate-wide 2026-04-10. panic_attack.v moved from
hyperpolymath/panic-attack api/v/ per V-sources-MOVE-not-delete policy.
MIGRATION.md explains replacement path (Zig FFI, planned).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: hyperpolymath

v-ecosystem/v-api-interfaces/v-panic-attack/MIGRATION.md

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: PMPL-1.0-or-later
+
+# panic-attack V-lang API — Migration Notice
+
+`panic_attack.v` was moved here from `hyperpolymath/panic-attack` repository
+(`api/v/panic_attack.v`) as part of the V-lang → Zig migration (2026-04-10).
+
+V-lang is banned estate-wide. This file is preserved in `v-ecosystem` per the
+V-sources-MOVE-not-delete policy.
+
+**Replacement:** `hyperpolymath/panic-attack` `ffi/zig/src/panic_attack.zig`
+(Zig FFI binding with identical C ABI surface). Status: planned.
+
+The V-lang binding exposed:
+- `Severity` enum (info/warning/error/critical)
+- `ScanOp` enum (assail/ambush/abduct/adjudicate/axial)
+- `Finding` struct (file, line, severity, message, rule_id)
+- C FFI procs: `panic_severity_compare`, `panic_severity_meets`, `panic_valid_lang`
+- Pub fns: `severity_meets()`, `is_supported_lang()`

v-ecosystem/v-api-interfaces/v-panic-attack/panic_attack.v

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: PMPL-1.0-or-later
+// Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
+//
+// panic-attack V-lang API — Static analysis scanner client.
+module panic_attack
+
+pub enum Severity {
+	info
+	warning
+	@error
+	critical
+}
+
+pub enum ScanOp {
+	assail
+	ambush
+	abduct
+	adjudicate
+	axial
+}
+
+pub struct Finding {
+pub:
+	file     string
+	line     int
+	severity Severity
+	message  string
+	rule_id  string
+}
+
+fn C.panic_severity_compare(a int, b int) int
+fn C.panic_severity_meets(severity int, threshold int) int
+fn C.panic_valid_lang(lang_id int) int
+
+// severity_meets checks if a finding meets a minimum severity threshold.
+pub fn severity_meets(severity Severity, threshold Severity) bool {
+	return C.panic_severity_meets(int(severity), int(threshold)) == 1
+}
+
+// is_supported_lang checks if a language ID is supported (0-46).
+pub fn is_supported_lang(lang_id int) bool {
+	return C.panic_valid_lang(lang_id) == 1
+}