feat: Add support for 3d assets through assimp converter

This is a start for #144
It does not support all the 3d formats, but its a good few

src/converters/assimp.ts

@@ -0,0 +1,139 @@
+import { exec } from "node:child_process";
+
+// This could be done dynamically by running `ffmpeg -formats` and parsing the output
+export const properties = {
+  from: {
+    muxer: [
+        "3d",
+        "3ds",
+        "3mf",
+        "ac",
+        "ac3d",
+        "acc",
+        "amf",
+        "ase",
+        "ask",
+        "assbin",
+        "b3d",
+        "blend",
+        "bsp",
+        "bvh",
+        "cob",
+        "csm",
+        "dae",
+        "dxf",
+        "enff",
+        "fbx",
+        "glb",
+        "gltf",
+        "hmp",
+        "ifc",
+        "ifczip",
+        "iqm",
+        "irr",
+        "irrmesh",
+        "lwo",
+        "lws",
+        "lxo",
+        "md2",
+        "md3",
+        "md5anim",
+        "md5camera",
+        "md5mesh",
+        "mdc",
+        "mdl",
+        "mesh",
+        "mesh.xml",
+        "mot",
+        "ms3d",
+        "ndo",
+        "nff",
+        "obj",
+        "off",
+        "ogex",
+        "pk3",
+        "ply",
+        "pmx",
+        "prj",
+        "q3o",
+        "q3s",
+        "raw",
+        "scn",
+        "sib",
+        "smd",
+        "step",
+        "stl",
+        "stp",
+        "ter",
+        "uc",
+        "vta",
+        "x",
+        "x3d",
+        "x3db",
+        "xgl",
+        "xml",
+        "zae",
+        "zgl",
+    ],
+  },
+  to: {
+    muxer: [
+        "collada",
+        "x",
+        "stp",
+        "obj",
+        "objnomtl",
+        "stl",
+        "stlb",
+        "ply",
+        "plyb",
+        "3ds",
+        "gltf2",
+        "glb2",
+        "gltf",
+        "glb",
+        "assbin",
+        "assxml",
+        "x3d",
+        "fbx",
+        "fbxa",
+        "m3d",
+        "m3da",
+        "3mf",
+        "pbrt",
+        "assjson",
+    ],
+  },
+};
+
+export async function convert(
+  filePath: string,
+  fileType: string,
+  convertTo: string,
+  targetPath: string,
+  // biome-ignore lint/suspicious/noExplicitAny: <explanation>
+  options?: any,
+): Promise<string> {
+  // let command = "ffmpeg";
+
+
+  const command = `assimp export "${filePath}" "${targetPath}"`;
+
+  return new Promise((resolve, reject) => {
+    exec(command, (error, stdout, stderr) => {
+      if (error) {
+        reject(`error: ${error}`);
+      }
+
+      if (stdout) {
+        console.log(`stdout: ${stdout}`);
+      }
+
+      if (stderr) {
+        console.error(`stderr: ${stderr}`);
+      }
+
+      resolve("success");
+    });
+  });
+}