feat: add environment variable support for Claude Code token limits

Introduces .env file configuration to manage CLAUDE_CODE_MAX_TOKENS, allowing flexible control of the context window size for AI analysis sessions. This enables users to tune token limits based on their specific penetration testing needs without modifying code.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

package-lock.json

@@ -13,6 +13,7 @@
         "ajv-formats": "^2.1.1",
         "boxen": "^8.0.1",
         "chalk": "^5.0.0",
+        "dotenv": "^16.4.5",
         "figlet": "^1.9.3",
         "gradient-string": "^3.0.0",
         "js-yaml": "^4.1.0",
@@ -438,6 +439,18 @@
         "node": ">=20"
       }
     },
+    "node_modules/dotenv": {
+      "version": "16.6.1",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.6.1.tgz",
+      "integrity": "sha512-uBq4egWHTcTt33a72vpSG0z3HnPuIl6NqYcTrKEg2azoEyl2hpW0zqlxysq2pK9HlDIHyHyakeYaYnSAwd8bow==",
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://dotenvx.com"
+      }
+    },
     "node_modules/emoji-regex": {
       "version": "10.5.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-10.5.0.tgz",