Overhaul events

- Refactor methods names and functionality
- Replace scroll listeners with observers
- Replace Tweezer-based scrolling with native scroll methods
- Remove tweezer.js dependency
- Remove redundant method calls
- Rename $resetEvents to onNavigate
- Rename __scrollActiveSidebar to onRender
- Remove __getAndActive
- Remove __sticky

package.json

@@ -66,8 +66,7 @@
     "opencollective-postinstall": "^2.0.2",
     "prismjs": "^1.29.0",
     "strip-indent": "^3.0.0",
-    "tinydate": "^1.3.0",
-    "tweezer.js": "^1.4.0"
+    "tinydate": "^1.3.0"
   },
   "devDependencies": {
     "@babel/core": "^7.11.6",