evidence-dsl: extract Evidence DSL v2 compiler from @arbiter/core

The Evidence DSL (ADR-000) is a thin declarative layer that compiles to
engine rule types. It has zero runtime coupling to the core engine
(DSLCompiler takes an arbiter as a duck-typed argument; the only shared
code was the ip-utils helpers, now local). Extracting it into its own
package keeps the core artifact free of the DSL surface.

- @arbiter/evidence-dsl depends on @arbiter/core (config formats are the
  compilation target)
- deep-path exports for the compiler, parser, generator, validation,
  and built-in functions (the surface the core's DSL tests consume)
- tests moved alongside; generate-parser script + peggy devDep local
- CI: test on push, publish on v* tags

package.json

@@ -0,0 +1,31 @@
+{
+  "name": "@arbiter/evidence-dsl",
+  "version": "1.0.0",
+  "description": "Evidence DSL v2 compiler: translates the natural Evidence DSL (ADR-000) into @arbiter/core relation configurations.",
+  "license": "ISC",
+  "type": "module",
+  "main": "src/index.js",
+  "exports": {
+    ".": "./src/index.js",
+    "./package.json": "./package.json",
+    "./DSLCompiler": "./src/DSLCompiler.js",
+    "./parser/DSLParser": "./src/parser/DSLParser.js",
+    "./parser/GeneratedParser": "./src/parser/GeneratedParser.js",
+    "./generator/RuleGenerator": "./src/generator/RuleGenerator.js",
+    "./validation/DSLValidation": "./src/validation/DSLValidation.js",
+    "./interpreter/BuiltInFunctions": "./src/interpreter/BuiltInFunctions.js"
+  },
+  "files": [
+    "src/"
+  ],
+  "scripts": {
+    "test": "node --test --test-force-exit \"tests/**/*.test.js\"",
+    "generate:parser": "node scripts/generate-parser.js"
+  },
+  "dependencies": {
+    "@arbiter/core": "^1.0.1"
+  },
+  "devDependencies": {
+    "peggy": "^5.0.6"
+  }
+}