chore: add missing dotfiles (.editorconfig, .tool-versions)

Add RSR standard files:
- .editorconfig - Editor configuration for consistent formatting
- .tool-versions - asdf tool versions (Rust 1.84.0, Node 22, Deno 2.1.4)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Test

.editorconfig

@@ -0,0 +1,68 @@
+# RSR-template-repo - Editor Configuration
+# 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
+
+[*.ex]
+indent_size = 2
+
+[*.exs]
+indent_size = 2
+
+[*.zig]
+indent_size = 4
+
+[*.ada]
+indent_size = 3
+
+[*.adb]
+indent_size = 3
+
+[*.ads]
+indent_size = 3
+
+[*.hs]
+indent_size = 2
+
+[*.res]
+indent_size = 2
+
+[*.resi]
+indent_size = 2
+
+[*.ncl]
+indent_size = 2
+
+[*.rkt]
+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

.tool-versions

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# asdf tool versions for WokeLang development
+
+# Rust toolchain
+rust 1.84.0
+
+# For ReScript frontend (site/)
+nodejs 22.12.0
+deno 2.1.4
+
+# Optional: Idris2 for ABI work
+# idris2 0.7.0
+
+# Optional: Zig for FFI work
+# zig 0.13.0