Add HTTP API docs markdown emitter with literal type support

packages/http-api-docs/lib/main.tsp

@@ -0,0 +1 @@
+import "../dist/src/index.js";

packages/http-api-docs/package.json

@@ -0,0 +1,65 @@
+{
+  "name": "@typespec/http-api-docs",
+  "version": "0.1.0",
+  "author": "Microsoft Corporation",
+  "description": "TypeSpec emitter that generates markdown reference documentation for HTTP-based services",
+  "homepage": "https://typespec.io",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/microsoft/typespec.git"
+  },
+  "bugs": {
+    "url": "https://github.com/microsoft/typespec/issues"
+  },
+  "keywords": [
+    "typespec"
+  ],
+  "type": "module",
+  "main": "dist/src/index.js",
+  "tspMain": "lib/main.tsp",
+  "exports": {
+    ".": {
+      "typespec": "./lib/main.tsp",
+      "types": "./dist/src/index.d.ts",
+      "default": "./dist/src/index.js"
+    },
+    "./testing": {
+      "types": "./dist/src/testing/index.d.ts",
+      "default": "./dist/src/testing/index.js"
+    }
+  },
+  "engines": {
+    "node": ">=20.0.0"
+  },
+  "scripts": {
+    "clean": "rimraf ./dist ./temp",
+    "build": "tsc -p tsconfig.build.json",
+    "quickbuild": "tsc -p tsconfig.build.json",
+    "watch": "tsc -p tsconfig.build.json --watch",
+    "test": "vitest run",
+    "test:watch": "vitest -w",
+    "test:ci": "vitest run --coverage --reporter=junit --reporter=default",
+    "lint": "eslint . --max-warnings=0",
+    "lint:fix": "eslint . --fix"
+  },
+  "files": [
+    "lib/*.tsp",
+    "dist/**",
+    "!dist/test/**"
+  ],
+  "peerDependencies": {
+    "@typespec/compiler": "workspace:^",
+    "@typespec/http": "workspace:^"
+  },
+  "devDependencies": {
+    "@typespec/compiler": "workspace:^",
+    "@typespec/http": "workspace:^",
+    "@typespec/rest": "workspace:^",
+    "@vitest/coverage-v8": "^4.0.15",
+    "@vitest/ui": "^4.0.15",
+    "rimraf": "~6.1.2",
+    "typescript": "~5.9.2",
+    "vitest": "^4.0.15"
+  }
+}