fix: add license-file key to Cargo.toml workspace configuration

[tamada]

No description provided.

[Copilot]

Pull request overview

Updates crate metadata/versioning and aligns the library crate with workspace-level license-file settings.

Changes:

• Add license-file.workspace = true to lib/Cargo.toml
• Bump workspace version to 0.8.13
• Update README and container build args/badges to 0.8.13

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
lib/Cargo.toml	Inherit license-file from workspace package metadata
Cargo.toml	Bump workspace package version to 0.8.13
README.md	Update version and Docker badges to 0.8.13
Containerfile	Update VERSION build args to 0.8.13

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[Copilot]

The PR title focuses on adding a license-file workspace configuration, but this PR also bumps the workspace version to 0.8.13 (and updates other files accordingly). Consider updating the PR title/description to reflect the version bump, or splitting the release/version updates into a separate PR to keep changes scoped.

[Copilot]

Only the lib crate is updated to inherit license-file from the workspace. The cli crate currently has neither license nor license-file set (and also doesn't inherit it), which can cause cargo publish/crates.io metadata checks to fail for totebag-cli. Consider adding license-file.workspace = true (or license.workspace = true) to cli/Cargo.toml as well to keep workspace crates consistent.