Strip deploy + Rust/npm surface: library becomes pure Solidity

Per rain.math.float#262 (Split into library + rain.math.float.deploy) and the
Hard Case A ruling, this repo becomes the pure Solidity math library that
publishes only the `rain-math-float` Soldeer package. The deployed concrete,
deploy pins/snapshot, deploy scripts/tests, and the Rust/WASM/npm bindings move
to rain.math.float.deploy.

Removed (77 files):
- Deploy Solidity: src/concrete/DecimalFloat.sol, src/generated/*,
  src/lib/deploy/LibDecimalFloatDeploy.sol, script/{Deploy,BuildPointers,
  check-published-deploy-constants.sh}, deploy tests, LibLogTable.bytes.t.sol.
- Rust/npm: crates/**, Cargo.*, package*.json, tsconfig.json, .prettierignore,
  test_js/**, scripts/*.js, the CopyArtifacts bridge (script + lib + test),
  and TestDecimalFloat harness + its two wrapper tests.
- Workflows: copy-artifacts, manual-sol-artifacts, rainix-rs-{static,test,wasm}.

Added / changed:
- test/abstract/LogTest.sol rewritten self-contained (Hard Case C): rebuilds the
  combined log tables from LibLogTable source and deploys them via LibDataContract
  at a `create` address, so the transcendental tests (log10/pow/pow10/sqrt) run
  with no Zoltu deploy pin and no src/generated snapshot.
- foundry.toml: drop rain-deploy + rain-sol-codegen deps, [rpc_endpoints],
  [etherscan], fs_permissions, ffi. Pragma stays `^`.
- package-release.yaml: publish only the rain-math-float Soldeer package
  (drop crate + npm-package inputs).
- flake.nix: drop test-wasm-build + test-js-bindings tasks.
- CLAUDE.md/README/REUSE.toml/.soldeerignore/.gitignore/remappings: library-only.
- .gas-snapshot + soldeer.lock regenerated for the stripped tree.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: thedavidmeister

.gas-snapshot

@@ -7,7 +7,5 @@ jobs:
   release:
     uses: rainlanguage/rainix/.github/workflows/rainix-autopublish.yaml@main
     with:
-      crate: rain-math-float
-      npm-package: "@rainlanguage/float"
       soldeer-package: rain-math-float
     secrets: inherit

.github/workflows/copy-artifacts.yaml

@@ -2,10 +2,7 @@ out
 cache
 dependencies
 .direnv
-target
 temp
-dist
-node_modules
 .env
 .fixes
 .pre-commit-config.yaml

.github/workflows/manual-sol-artifacts.yaml

@@ -7,31 +7,21 @@
 .gitignore
 .gitmodules
 .pre-commit-config.yaml
-.prettierignore
 .soldeerignore
 .vscode
 CLAUDE.md
 /audit
 /cache
-/crates
 /dependencies
-/dist
-/docs
 /flake.lock
 /flake.nix
 /foundry.lock
 /foundry.toml
 /lib
-/node_modules
 /out
-/package.json
-/package-lock.json
 /remappings.txt
-/scripts
 /slither.config.json
 /soldeer.lock
 /target
 /test
-/test_js
-/tsconfig.json
 /REUSE.toml