docs: add a root LICENSE pointing to LICENSE-MIT/LICENSE-APACHE

[Fieldnote-Echo]

Adds a root LICENSE that states the MIT OR Apache-2.0 dual license and points to LICENSE-MIT and LICENSE-APACHE.

Why: license-file auto-detectors (OpenSSF Best Practices license_location, GitHub's licensee, etc.) look for a single LICENSE/COPYING at the repo root and don't recognize the hyphenated Rust dual-license naming, so they report "no license file found" even though both license texts are present at the root. This makes the licensing discoverable to those tools.

No change to the actual terms: Cargo.toml license = "MIT OR Apache-2.0" is unchanged, and LICENSE-MIT / LICENSE-APACHE remain the authoritative texts. The new file is a pointer/notice.

Once merged, the OpenSSF Best Practices license_location criterion auto-detects Met (it currently keeps reverting our manual Met because the robot re-runs detection on save).

[qodo-code-review]

Review Summary by Qodo

Add root LICENSE file for dual-license auto-detection

📝 Documentation

Walkthroughs

Description

• Adds root LICENSE file for license auto-detector compatibility
• Declares dual MIT OR Apache-2.0 licensing with pointers
• Improves licensing discoverability for OpenSSF and GitHub tools
• No change to actual license terms or Cargo.toml

Diagram

flowchart LR
  A["LICENSE-MIT<br/>LICENSE-APACHE<br/>Authoritative texts"] -->|"Pointed to by"| B["New root LICENSE<br/>MIT OR Apache-2.0"]
  B -->|"Discovered by"| C["License auto-detectors<br/>OpenSSF, GitHub licensee"]

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File Changes

1. LICENSE 📝 Documentation +20/-0

Add root LICENSE dual-license pointer file

• Creates new root LICENSE file with dual-license declaration
• States MIT OR Apache-2.0 licensing with SPDX identifier
• Points to LICENSE-MIT and LICENSE-APACHE as authoritative texts
• Includes contributor license agreement clause for Apache-2.0

LICENSE

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[qodo-code-review]

Code Review by Qodo

🐞 Bugs (0) 📘 Rule violations (0) 📎 Requirement gaps (0)

Great, no issues found!

Qodo reviewed your code and found no material issues that require review

[gemini-code-assist]

Code Review

This pull request adds a LICENSE file specifying dual-licensing under either the Apache License, Version 2.0 or the MIT license. There are no review comments to address.