Fixed:

- Now periodic internal file scanning works well.
- The handler of Window-visibility-changed has been fixed.
- And minor fixes possibly included.
Refactored:
- Unused logic has been removed.
- Some utility functions have been moved into suitable files.
- Function names have been renamed.

src/deps.ts

@@ -0,0 +1,4 @@
+export {
+    addIcon, App, DataWriteOptions, debounce, Editor, FuzzySuggestModal, MarkdownRenderer, MarkdownView, Modal, normalizePath, Notice, Platform, Plugin, PluginManifest,
+    PluginSettingTab, Plugin_2, requestUrl, RequestUrlParam, RequestUrlResponse, sanitizeHTMLToDom, Setting, stringifyYaml, TAbstractFile, TextAreaComponent, TFile, TFolder
+} from "obsidian";