chore: Migrate base to core26 and python 3.14

flake.nix

@@ -13,7 +13,7 @@
   }:
     utils.lib.eachDefaultSystem (system: let
       pkgs = import nixpkgs {inherit system;};
-      pythonPkgs = pkgs.python312Packages;
+      pythonPkgs = pkgs.python314Packages;
     in {
       packages.default = pythonPkgs.buildPythonPackage {
         pname = "craft-ls";
@@ -39,7 +39,7 @@
         # inputsFrom = [self.packages.${system}.default];
         packages = with pkgs; [
           uv
-          python312Packages.nox
+          python314Packages.nox
         ];
       };
     });

snapcraft.yaml

@@ -10,23 +10,31 @@ issues:
   - https://github.com/Batalex/craft-ls/issues/new
 
 adopt-info: craft-ls
-base: core24
+base: core26
 confinement: strict
 platforms:
   amd64:
   arm64:
 
 parts:
+  runtime:
+    plugin: nil
+    stage-packages:
+      - libpython3.14-minimal
+      - libpython3.14-stdlib
+      - python3-minimal
+      - python3.14-minimal
+      - python3.14-venv
+
   craft-ls:
+    after: [runtime]
     plugin: uv
     source: .
     build-snaps:
       - astral-uv
     override-build: |
       craftctl set version="$(cat src/craft_ls/__init__.py | cut -d '"' -f2 | xargs)"
       craftctl default
-    stage-packages:
-      - python3-venv
 
 apps:
   craft-ls: