Include README in npm package, add keywords, bump to v0.7.5

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: tylergibbs1

package.json

@@ -1,6 +1,6 @@
 {
   "name": "stratus-sdk",
-  "version": "0.7.4",
+  "version": "0.7.5",
   "type": "module",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
@@ -18,7 +18,8 @@
       "import": "./dist/azure/index.js"
     }
   },
-  "files": ["dist"],
+  "keywords": ["azure", "openai", "agent", "ai", "llm", "typescript", "tools", "streaming"],
+  "files": ["dist", "README.md"],
   "scripts": {
     "build": "tsc -p tsconfig.build.json",
     "typecheck": "tsc --noEmit",