[codex] rewrite package README

[meekmachine]

Summary

This PR rewrites the Loom3 package README around the current runtime surface, current CharacterLoom companion links, and the latest README strategy from issues #97/#98 plus the viseme research/issues.

The core framing is now: Loom3 is a semantic Three.js character-animation runtime and profile layer, not just a morph/bone mapping helper.

What Changed

• Rebuilt the README against current origin/main so the PR is no longer conflicting.
• Updated public live-app language from LoomLarge/demo prose to CharacterLoom, including current tab ids such as aus, tracking, poses, gestures, and annotations.
• Corrected the animation architecture language after [codex] Restore baked additive safety #133: baked and generated/procedural playback share a normalized control model, but are evaluated through separated passes for safer precedence.
• Updated viseme/lip-sync docs for the shipped profile-defined runtime from Add profile-defined viseme mapping system #131/[codex] Align live viseme runtime with bindings #135: slots, bindings, id-based APIs, provider matching helpers, weighted targets, and strongest-active jaw aggregation.
• Added current shipped APIs to the README: runtime morph authoring, clip lifecycle events, baked clip channels, profile-first config helpers, and annotation camera-angle helpers.
• Updated README_FINDINGS.md, README_OUTLINE.md, and README_COMPARABLES.md so the strategy separates shipped work from pending issues/PRs.

Pending Work Kept Out Of Shipped Docs

The strategy notes now explicitly keep these as pending/roadmap rather than documenting them as current behavior: lip-sync sequence compilation (#141/#143), inherited first keyframes (#136/#142), base pose API (#138), dynamic clip parameter hardening (#116/#137), semantic joint-control authoring/inference (#108), external payload rehydration (#122), and Rust/Wasm runtime-core research (#146).

Validation

• git diff --check origin/main...HEAD
• searched README/strategy docs for stale loomlarge.web.app, tab=action-units, Open in LoomLarge, resolveProfile(, old hard-coded jaw claims, and stale mixer-world language
• PR branch merged current origin/main; GitHub reports PR [codex] rewrite package README #99 as mergeable
• no package tests run; docs-only PR diff against origin/main

[meekmachine]

I reviewed this draft against the May 25 README course-correction work in #97.

This PR has useful material that should be preserved, especially the stronger animation-system framing, curve/clip/snippet definitions, and combined playback examples. It is also now stale/conflicting against current main and predates several important changes: CharacterLoom links, Emotes tab naming, profile-defined viseme bindings, the profile-first config model, runtime morph authoring, annotation camera helpers, and the post-#133 baked/generated mixer-pass architecture.

Recommended integration plan is documented here: #97 (comment)

My recommendation is to mine this PR for the good prose/research, rebuild the README PR from current origin/main, then close this draft as superseded unless preserving PR #99 itself is important enough to force-update the branch.

[meekmachine]

PR backlog triage — REBASE_KEEP

Still wanted on the Polymer / agencySociety / host plan.

Next step: rebase onto current main, resolve conflicts, ensure CI green, then undraft (if draft) for merge.

README rewrite — rebase; supersedes closed README issue batch.

Plan: https://github.com/meekmachine/Polymer/discussions/59