Updated READMEs to point to docs

[codebycarson]

As there are new docs at https://sei-js.docs.sei.io we don't want to maintain duplicate sources of truth. As LLM's pull from that we will guide users to the docs instead of the README files.

[changeset-bot]

⚠️ No Changeset found

Latest commit: b9a5d6b

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (93c3acc) to head (db01294).

Additional details and impacted files

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  Coverage   100.00%   100.00%           
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  Files           73        73           
  Lines          855       855           
  Branches       139       139           
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  Hits           855       855           

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[Copilot]

Pull Request Overview

This pull request updates README files across multiple packages to redirect users to the new centralized documentation site at https://sei-js.docs.sei.io instead of maintaining duplicate documentation in README files.

• Replaces detailed documentation with concise quick start guides
• Standardizes README format across all packages with consistent branding and badges
• Updates all documentation links to point to the new documentation site

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/sei-global-wallet/README.md	Simplified to quick start guide with documentation link
packages/precompiles/README.md	Condensed extensive documentation to essential usage info
packages/mcp-server/README.md	Replaced comprehensive guide with basic setup instructions
packages/ledger/README.md	Streamlined from detailed API docs to quick start format
packages/create-sei/README.md	Simplified setup instructions with documentation reference
.changeset/sharp-seas-fix.md	Added changeset for README updates