v0.7.0 : Jean devient AJEAN

Bump de version et notes de release. Le renommage complet jean -> AJEAN
est decrit dans RELEASE_NOTES.md ; les commits precedents en portent le
detail technique.

cmd/ajean/versioninfo.json

@@ -2,14 +2,14 @@
   "FixedFileInfo": {
     "FileVersion": {
       "Major": 0,
-      "Minor": 6,
-      "Patch": 15,
+      "Minor": 7,
+      "Patch": 0,
       "Build": 0
     },
     "ProductVersion": {
       "Major": 0,
-      "Minor": 6,
-      "Patch": 15,
+      "Minor": 7,
+      "Patch": 0,
       "Build": 0
     },
     "FileFlagsMask": "3f",
@@ -25,7 +25,7 @@
     "LegalCopyright": "Copyright (c) 2026 AJEAN contributors. MIT License.",
     "OriginalFilename": "ajean.exe",
     "ProductName": "AJEAN",
-    "ProductVersion": "0.6.15",
+    "ProductVersion": "0.7.0",
     "Comments": "https://github.com/nathaninline/ajean — projet open source (MIT)"
   },
   "VarFileInfo": {