chore(deps): update dependencies to resolve Dependabot PRs

- Update happy-dom from ^17.4.4 to ^20.0.2
- Update vite-plugin-static-copy from ^0.16.0 to ^0.17.1 (latest compatible with vite 4.x)
- Update aiohttp from 3.9.2 to ^3.12.14
- Update setuptools from ^68.0.0 to ^78.1.1
- Bump minimum Python version to 3.9 (3.8 is EOL, required for setuptools 78.x)
- Remove deprecated poetry.dev-dependencies section

This addresses Dependabot PRs: Kitware#829, Kitware#809, Kitware#803, Kitware#781

Author: claude

package-lock.json

@@ -90,7 +90,7 @@
     "eslint-plugin-import": "2.26.0",
     "eslint-plugin-vue": "^8.0.3",
     "eslint-plugin-vuejs-accessibility": "^1.1.0",
-    "happy-dom": "^17.4.4",
+    "happy-dom": "^20.0.2",
     "lint-staged": "10.5.4",
     "patch-package": "^8.0.0",
     "prettier": "2.8.8",
@@ -102,7 +102,7 @@
     "typescript": "~5.1.3",
     "vite": "^4.5.2",
     "vite-plugin-html": "^3.2.0",
-    "vite-plugin-static-copy": "^0.16.0",
+    "vite-plugin-static-copy": "^0.17.1",
     "vite-plugin-vuetify": "^1.0.2",
     "vitepress": "^1.2.3",
     "vitest": "^0.32.1",