Add Nika

[ThibautMelen]

Adds Nika to the Frameworks section (after Bernstein — same receipts-minded family).

Nika is a workflow language and runner for AI jobs: the job lives in one plain-text .nika.yaml DAG, statically checked before anything runs (plan, types, secret flows into prompts, honest cost floor), executed by a single Rust binary. Every run writes a hash-chained trace (nika trace verify). Ships an in-binary MCP server, a GitHub Action, and a VS Code extension. Works fully offline (mock + Ollama paths need zero keys).

Docs: https://docs.nika.sh · Engine AGPL-3.0, spec + SDK Apache-2.0.

Full disclosure: I'm the author. Actively maintained (latest release 0.99.0, 2026-07-10, weekly cadence).

🤖 Generated with Claude Code

[Scottcjn]

The Nika entry itself is fine, but this diff is +223/-222 — it rewrites every line in the file (looks like a CRLF/line-ending change). Please resubmit with just the one-line addition so the diff is +1, and it merges clean.

[Scottcjn]

Maintainer review: the Nika entry may be suitable, but this PR rewrites line endings across almost the entire README (223 additions / 222 deletions). Please preserve the existing line endings and resubmit the change as the single intended catalog entry so the factual claims can be reviewed clearly.