Add D3.js dependency and implement pending upload state management

- Added D3.js as a dependency in `package.json` and `package-lock.json` for data visualization capabilities.
- Introduced a new `pendingUpload.js` store to manage files and simulation requirements before initiating the simulation process.
- Updated `Home.vue` to store pending uploads and navigate to the `Process` page immediately, deferring API calls for improved user experience.
- Enhanced `Process.vue` to handle new project initialization and display project status effectively, including progress tracking for ontology generation and graph building.

frontend/src/store/pendingUpload.js

@@ -0,0 +1,33 @@
+/**
+ * 临时存储待上传的文件和需求
+ * 用于首页点击启动引擎后立即跳转，在Process页面再进行API调用
+ */
+import { reactive } from 'vue'
+
+const state = reactive({
+  files: [],
+  simulationRequirement: '',
+  isPending: false
+})
+
+export function setPendingUpload(files, requirement) {
+  state.files = files
+  state.simulationRequirement = requirement
+  state.isPending = true
+}
+
+export function getPendingUpload() {
+  return {
+    files: state.files,
+    simulationRequirement: state.simulationRequirement,
+    isPending: state.isPending
+  }
+}
+
+export function clearPendingUpload() {
+  state.files = []
+  state.simulationRequirement = ''
+  state.isPending = false
+}
+
+export default state