feat: add deeplink compression logic to sdk-multichain

[ffmcgee725]

Explanation

The goal of this PR is to add deeplink compression logic to decrease size of transported payloads across established connections.

References

• Fixes https://www.notion.so/metamask-consensys/SDK-Phase-1-End-game-276f86d67d688061a461ee0cbaf37649?p=278f86d67d6880c0a460f671085afbea&pm=s

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've highlighted breaking changes using the "BREAKING" category above as appropriate

---

Note

Compresses connection request payloads for deeplink and universal links via pako-based utility and updates deps.

• Links generation (packages/sdk-multichain/src/ui/index.ts):
  • Compress ConnectionRequest JSON before encoding for createDeeplink and createUniversalLink.
  • Append c=1 flag to indicate compressed payloads.
• Utils (packages/sdk-multichain/src/multichain/utils/index.ts):
  • Add cross-platform base64Encode and compressString (pako deflate) utilities; export compressString.
• Dependencies (packages/sdk-multichain/package.json):
  • Add pako and @types/pako.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.99%. Comparing base (7af4f97) to head (9f3894e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1360   +/-   ##
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  Coverage   74.99%   74.99%           
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  Files         184      184           
  Lines        4519     4519           
  Branches     1108     1108           
=======================================
  Hits         3389     3389           
  Misses       1130     1130           

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[elribonazo]

LGTM, awesome PR @ffmcgee725 thanks!