fix recursive imports from manifest

[Supermanu]

Hi,
I have an issue with recursive imports from the vite manifest. Let me explain. With the production build, vite is splitting into different chunks my js code, like this for instance :

static/.vite/manifest.json                              6.05 kB │ gzip:   0.96 kB
static/assets/contact_info-BONdzhdf.css                 0.04 kB │ gzip:   0.06 kB
static/assets/annuaire-BD7dvoKS.css                     0.16 kB │ gzip:   0.15 kB
static/assets/menu_bar-B1DNQiR2.css                   243.05 kB │ gzip:  34.83 kB
static/assets/vue-router-oFY6fX0y.js                   88.67 kB │ gzip:  31.06 kB
static/assets/annuaire-Bw0mGyaT.js                    275.47 kB │ gzip:  80.65 kB
static/assets/menu_bar-Cg_ihQeU.js                  1,308.06 kB │ gzip: 341.85 kB

My entry point is only one js file annuaire.js and the vite manifest.json looks like this :

{
  "_contact_info-!~{00h}~.js": {
    "file": "assets/contact_info-BONdzhdf.css",
    "src": "_contact_info-!~{00h}~.js"
  },
  "_contact_info-qI9Vj_GE.js": {
    "file": "assets/contact_info-qI9Vj_GE.js",
    "name": "contact_info",
    "imports": [
      "_menu_bar-Cg_ihQeU.js",
      "_vue-router-oFY6fX0y.js"
    ],
    "css": [
      "assets/contact_info-BONdzhdf.css"
    ]
  },
  "_menu_bar-!~{00b}~.js": {
    "file": "assets/menu_bar-B1DNQiR2.css",
    "src": "_menu_bar-!~{00b}~.js"
  },
  "_menu_bar-Cg_ihQeU.js": {
    "file": "assets/menu_bar-Cg_ihQeU.js",
    "name": "menu_bar",
    "css": [
      "assets/menu_bar-B1DNQiR2.css"
    ]
  },
  "_search-Cdf3p1k0.js": {
    "file": "assets/search-Cdf3p1k0.js",
    "name": "search",
    "imports": [
      "_menu_bar-Cg_ihQeU.js"
    ]
  },
  "_vue-router-oFY6fX0y.js": {
    "file": "assets/vue-router-oFY6fX0y.js",
    "name": "vue-router",
    "imports": [
      "_menu_bar-Cg_ihQeU.js"
    ]
  },
  "annuaire/static/annuaire/js/annuaire.js": {
    "file": "assets/annuaire-Bw0mGyaT.js",
    "name": "annuaire",
    "src": "annuaire/static/annuaire/js/annuaire.js",
    "isEntry": true,
    "imports": [
      "_menu_bar-Cg_ihQeU.js",
      "_vue-router-oFY6fX0y.js",
      "_contact_info-qI9Vj_GE.js"
    ],
    "css": [
      "assets/annuaire-BD7dvoKS.css"
    ]
  },
}

django-vite-plugin has no problem to add the related css file (annuaire-BD7dvoKS.css in this case). But when it comes to recursively find other css imports menu_bar-B1DNQiR2.css for instance from _menu_bar-Cg_ihQeU.js, it fails since the function _get_css_files in utils.py should have a manifest_entry Dict and not a path. This PR fix this.