feat: PySide6 dev environment with runnable examplesHEADmain

Flake devShell (PySide6 6.11 on Python 3.13, designer, uic/rcc from
qtbase libexec, offline docs) plus hello_widgets and hello_quick
examples. QML_IMPORT_PATH exported — nixpkgs PySide6 finds platform
plugins on its own but not QML imports; see README.

1 files changed, 27 insertions, 0 deletions

diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..458bca5
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1783389287,
+        "narHash": "sha256-0xIy4dVLqq47rA+mRy0hXDfjhQd4E5PoIns/RmB7nR4=",
+        "owner": "Nixos",
+        "repo": "nixpkgs",
+        "rev": "0ad6f47ea4fe188f4bc8f0380f93ae8523337c6c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Nixos",
+        "ref": "nixos-26.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}