feat: add base rpcUrls for Alchemy

[avasisht23]

PR-Codex overview

This PR focuses on adding Alchemy RPC URLs for the Base chain.

Detailed summary

• Added Alchemy RPC URLs for the Base chain in src/chains/definitions/base.ts.
• Added Alchemy RPC URLs for the Base Goerli chain in src/chains/definitions/baseGoerli.ts.

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🦋 Changeset detected

Latest commit: 629697e

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -8.20% ⚠️

Comparison is base (2b64f70) 99.80% compared to head (4dfe334) 91.61%.
Report is 3 commits behind head on main.

❗ Current head 4dfe334 differs from pull request most recent head 629697e. Consider uploading reports for the commit 629697e to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1175      +/-   ##
==========================================
- Coverage   99.80%   91.61%   -8.20%     
==========================================
  Files         399      390       -9     
  Lines       31313    30462     -851     
  Branches     1919     1411     -508     
==========================================
- Hits        31252    27907    -3345     
- Misses         55     2537    +2482     
- Partials        6       18      +12     

Files Changed	Coverage Δ
src/chains/definitions/base.ts	100.00% <100.00%> (ø)
src/chains/definitions/baseGoerli.ts	100.00% <100.00%> (ø)

... and 125 files with indirect coverage changes

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[moldy530]

LG from alchemy side of things