Minor 1.5 (#18)

- Updated repository documentation: added contribution guidelines, Code of Conduct, GitHub templates
- Updated README
- Added confirmation dialog for tabs and collections deletion (#17)
- Complete code refactoring (HTML/JS/CSS)
- Implemented <iframe> base for embedded pane (#13) (Fixed CSS instability on some websites)
- Improved dark theme
- Added opensource fonts to replace Segoe UI on Unix systems (#11, #17)
- Fixed invisible vertical scrollbar
- Code polish and improvement

Co-authored-by: Amine A. <15179425+AmineI@users.noreply.github.com>
Co-Authored-By: Michael Gordeev <michael@xfox111.net>

manifest.json

@@ -1,6 +1,6 @@
 {
 	"name": "Tabs Aside",
-	"version": "1.4",
+	"version": "1.5",
 	"manifest_version": 2,
 	"description": "Classic Microsoft Edge \"Tabs Aside\" feature for Chromium browsers",
 	"author": "Michael \"XFox\" Gordeev",