Include a file-safe room name and ISO date in chat exports (#9440)

* conversation export named after room

* sanitization added for exported file name

* sanitization added for exported file name

* sanitization added for exported file name

* sanitization added for exported file name=>lint error fixed

* sanitization added for exported file name=>lint error fixed

* sanitization added for exported file name=>redundancy removed

* sanitization added for exported file name=>redundancy removed

* reverted to previous commit

* sanitization added for exported file name=>redundancy removed

* exported chat date iso formatted

* conversation export named after room

* conversation export named after room

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

* code refacto filename date format

* Add docs to fn

* Bring in a util library for sanitizing

* Extract file naming function and make consistent for all 3 types

Also use the library we dragged in

* Write tests & associated fixes

* Apply linters locally

* Include new date util in index

Co-authored-by: Sinharitik589 <sinharitik18112835@gmail.com>
Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>
Co-authored-by: yaya-usman <yayaazeez222@gmail.com>
Co-authored-by: Sinharitik589 <67551927+Sinharitik589@users.noreply.github.com>

package.json

@@ -111,6 +111,7 @@
     "react-focus-lock": "^2.5.1",
     "react-transition-group": "^4.4.1",
     "rfc4648": "^1.4.0",
+    "sanitize-filename": "^1.6.3",
     "sanitize-html": "^2.3.2",
     "tar-js": "^0.3.0",
     "ua-parser-js": "^1.0.2",