Relicense from Apache-2.0 to MIT

[Jaro-c]

The org switched its single license from Apache-2.0 to MIT (the licensing standard was updated). This repo is still on Apache-2.0 and needs to be relicensed as part of the org-wide migration. epistle and epistle-panel are the completed pilots.

Relicense this repo to MIT:

• Replace LICENSE with the canonical MIT text, Copyright (c) 2026 Glyndor.
• Set the manifest license to MIT (Cargo.toml / package.json / go.mod metadata / extension manifest.json, whichever applies).
• Update the README license badge/link to MIT.
• Remove NOTICE if present — it is an Apache-2.0 §4(d) mechanism that MIT does not use.
• Update any SPDX-License-Identifier: Apache-2.0 headers in source to MIT.
• Do not change dependency-license allowlists (deny.toml / about.toml) — those govern which third-party licenses are permitted, not this repo's own license.

Relicensing is clean here: I hold the copyright and there are no external contributors (PRs are collaborators-only), so no CLA is needed.