chore: establish @minmoto/sdk package identity and docs

[okjodom]

Summary

• rename the public npm package and release metadata to @minmoto/sdk
• rewrite the README as the developer entrypoint for the SDK, leading with its Partner-bound model and the workflows developers can build
• document requirements, installation, client capabilities, live events, configuration, typed errors, API-key security, and contribution paths
• exercise the corrected scope in the packed-consumer runtime and TypeScript smoke tests

Verification

• npm run check
• npm run test:package
• npm pack --dry-run
• git diff --check
• tracked-file audit confirms no @minmo/sdk public-package references remain

[Copilot]

Pull request overview

This PR updates the public package identity across the repository so the published SDK is consistently named @minmoto/sdk, aligning docs, Release Please metadata, and the package-consumer smoke tests with the corrected npm scope.

Changes:

• Renamed the published npm package (and lockfile metadata) from @minmo/sdk to @minmoto/sdk.
• Updated documentation and release automation configuration to reference @minmoto/sdk.
• Updated the packed-consumer runtime + TypeScript smoke test imports and installation checks to validate the new scope.

Verification noted in PR description (reported by author):

• npm run check
• npm run test:package
• npm pack --dry-run
• git diff --check

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
scripts/vendor-upstream.mjs	Adjusts vendor-workflow preflight messages to avoid referencing the old public package name.
scripts/test-package.mjs	Updates smoke-test consumer imports and node_modules assertions to @minmoto/sdk.
release-please-config.json	Updates Release Please package-name to @minmoto/sdk.
README.md	Updates install + import examples and wording to @minmoto/sdk.
package.json	Renames the package to @minmoto/sdk.
package-lock.json	Updates lockfile metadata to the new package name.
CHANGELOG.md	Updates changelog intro text to reference @minmoto/sdk.
AGENTS.md	Updates repository purpose and upstream instructions to reference @minmoto/sdk.

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