feature(ui-ux): add new tokens and dtokens for matic, sol, and dot

[chloezxyy]

What this PR does / why we need it:

As titled. Add tokens icon symbols to display on screens like LM, Auctions etc. - once data is available on-chain, the added tokens will be reflected.

Which issue(s) does this PR fixes?:

Fixes #

Additional comments?:

Developer Checklist:

• [ ] Read your code changes at least once
• [ ] Tested on iOS/Android device (e.g, No crashes, library supported etc.)
• [ ] No console errors on web
• [ ] Tested on Light mode and Dark mode*
• [ ] Your UI implementation visually matched the rendered design*
• [ ] Unit tests*
• [ ] Added e2e tests*
• [ ] Added translations*

[github-actions[bot]]

Missing Translations Report

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[codecov-commenter]

Codecov Report

Merging #4016 (b81cc8a) into main (7a57e57) will decrease coverage by 0.07%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #4016      +/-   ##
==========================================
- Coverage   57.85%   57.79%   -0.07%     
==========================================
  Files         460      466       +6     
  Lines       12355    12367      +12     
  Branches     4084     4084              
==========================================
- Hits         7148     7147       -1     
- Misses       5119     5132      +13     
  Partials       88       88              

Files Changed	Coverage Δ
mobile-app/app/components/icons/assets/DOT.tsx	0.00% <0.00%> (ø)
mobile-app/app/components/icons/assets/MATIC.tsx	0.00% <0.00%> (ø)
mobile-app/app/components/icons/assets/SOL.tsx	0.00% <0.00%> (ø)
mobile-app/app/components/icons/assets/dDOT.tsx	0.00% <0.00%> (ø)
mobile-app/app/components/icons/assets/dMATIC.tsx	0.00% <0.00%> (ø)
mobile-app/app/components/icons/assets/dSOL.tsx	0.00% <0.00%> (ø)
mobile-app/app/components/icons/assets/index.ts	100.00% <ø> (ø)

... and 5 files with indirect coverage changes

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[github-actions[bot]]

Build preview for DeFiChain Wallet is ready!

Built with commit 9086fb04062c12a37d06ea58ad52ff8e91677b5c

https://expo.io/@defichain/wallet?release-channel=pr-preview-4016