#511 | Update teloscan analytics

[ezra-sg]

Fixes #511

Description

This PR updates how Fathom analytics is used to avoid a deprecated method, and adds support for tracking Brave wallet logins

Test scenarios

• this PR will need to be tested locally in the brave browser. run git fetch --all && git checkout 511-analytics-updates && yarn && yarn dev
• open ChainStore.ts and paste this at the top of the function trackAnalyticsEvent: console.log('tracking fathom event with name ' + eventName);
• open your browser to http://localhost:8080
• open your browser dev console
• in the dev console, filter messages by fathom (so you can see fathom logging easier)
• if you are using brave browser ad blocking or any ad blocker, disable it
• if you have already connected your Metamask to localhost, disconnect it from the metamask menu
• click "Connect wallet" in Teloscan
• click Metamask
  • you should see an event fire with the Login Started name
• connect with metamask
  • you should see events fire with Login Successful and Login Successful - Metamask names
• log out
• click "Connect Wallet"
• click Wallet Connect
  • you should see an event fire with the Login Started name
• proceed to log in with walletconnect using your phone
  • you should see events fire with Login Successful and Login Successful - WalletConnect names
• log out
• disable metamask and any other wallets
• enable your brave wallet in the brave settings
• login to teloscan using brave
  • you should see events fire with Login Successful and Login Successful - Brave names

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have cleaned up the code in the areas my change touches
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings
• I have removed any unnecessary console messages
• I have included all english text to the translation file and/or created a new issue with the required translations for the currently supported languages
• I have tested for mobile functionality and responsiveness
• I have added appropriate test coverage

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