Generate crash report txt and webpage

The last 100 lines of logs are now cached, and when a crash occurs, they
are saved to a file in the temp directory ("/tmp" on *nix), and pretty
HTML version is also created and opened in the browser.
* Currently only handles panics, will be included in more places soon
* Copy button and button to generate a GH issue will be added

package.json

@@ -22,10 +22,12 @@
     "a17t": "^0.4.0",
     "browserslist": "^4.16.6",
     "esbuild": "^0.8.57",
+    "inline-css-cli": "^0.0.1",
     "lodash": "^4.17.21",
     "mjml": "^4.8.0",
     "remixicon": "^2.5.0",
     "remove-markdown": "^0.3.0",
-    "typescript": "^4.0.3"
+    "typescript": "^4.0.3",
+    "uncss": "^0.17.3"
   }
 }