chore: add missing tooling (gitattributes, editorconfig, CI)

Refs hyperpolymath/standards#102

Author: hyperpolymath

.editorconfig

@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: MPL-2.0
+# https://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.adoc]
+trim_trailing_whitespace = false
+
+[*.rs]
+indent_size = 4
+
+[*.zig]
+indent_size = 4
+
+[*.ada]
+indent_size = 3
+
+[*.adb]
+indent_size = 3
+
+[*.ads]
+indent_size = 3
+
+[*.ex]
+indent_size = 2
+
+[*.exs]
+indent_size = 2
+
+[*.hs]
+indent_size = 2
+
+[*.res]
+indent_size = 2
+
+[*.resi]
+indent_size = 2
+
+[*.ncl]
+indent_size = 2
+
+[*.scm]
+indent_size = 2
+
+[*.nix]
+indent_size = 2
+
+[Justfile]
+indent_style = space
+indent_size = 4
+
+[justfile]
+indent_style = space
+indent_size = 4
+
+[Makefile]
+indent_style = tab

.gitattributes

@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: MPL-2.0
+# RSR-compliant .gitattributes
+
+* text=auto eol=lf
+
+# Source
+*.rs    text eol=lf diff=rust
+*.ex    text eol=lf diff=elixir
+*.exs   text eol=lf diff=elixir
+*.jl    text eol=lf
+*.res   text eol=lf
+*.resi  text eol=lf
+*.ada   text eol=lf diff=ada
+*.adb   text eol=lf diff=ada
+*.ads   text eol=lf diff=ada
+*.hs    text eol=lf
+*.chpl  text eol=lf
+*.scm   text eol=lf
+*.a2ml  text eol=lf linguist-language=TOML
+*.ncl   text eol=lf
+*.nix   text eol=lf
+*.zig   text eol=lf
+
+# Docs
+*.md    text eol=lf diff=markdown
+*.adoc  text eol=lf
+*.txt   text eol=lf
+
+# Data
+*.json  text eol=lf
+*.yaml  text eol=lf
+*.yml   text eol=lf
+*.toml  text eol=lf
+
+# Config
+.gitignore     text eol=lf
+.gitattributes text eol=lf
+.editorconfig  text eol=lf
+.tool-versions text eol=lf
+justfile       text eol=lf
+Makefile       text eol=lf
+Containerfile  text eol=lf
+
+# Scripts
+*.sh   text eol=lf
+
+# Binary
+*.png   binary
+*.jpg   binary
+*.gif   binary
+*.pdf   binary
+*.woff2 binary
+*.zip   binary
+*.gz    binary
+
+# Lock files
+Cargo.lock  text eol=lf -diff
+flake.lock  text eol=lf -diff

.github/workflows/governance.yml

@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: MPL-2.0
+# governance.yml — single wrapper calling the shared estate governance bundle
+# in hyperpolymath/standards instead of carrying per-repo copies.
+#
+# Replaces the per-repo governance scaffolding removed in the same commit:
+#   quality.yml, guix-nix-policy.yml, npm-bun-blocker.yml, ts-blocker.yml,
+#   security-policy.yml, rsr-antipattern.yml, wellknown-enforcement.yml,
+#   workflow-linter.yml
+#
+# Load-bearing build/security workflows stay standalone in the repo
+# (rust-ci, codeql, dependabot, release, scan/mirror/pages plumbing).
+
+name: Governance
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+  workflow_dispatch:
+
+# Estate guardrail: cancel superseded runs so re-pushes / rebased PR
+# updates do not pile up queued runs against the shared account-wide
+# Actions concurrency pool. Applied only to read-only check workflows
+# (no publish/mutation), so cancelling a superseded run is always safe.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  governance:
+    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@main