deps: Upgrade to TypeScript 5.6.3

[nellh]

Upgrade to the latest stable release for TypeScript and update the yarn SDK.

Pre-req for getting @bids/validator working on the client.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 43.10%. Comparing base (556621f) to head (8146ad6).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
packages/openneuro-cli/src/upload.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3182      +/-   ##
==========================================
- Coverage   43.10%   43.10%   -0.01%     
==========================================
  Files         547      547              
  Lines       36177    36178       +1     
  Branches     1128     1128              
==========================================
  Hits        15595    15595              
- Misses      20382    20383       +1     
  Partials      200      200              

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