Add ServiceHost, ServiceClient, and RondevuService for high-level service management

- Add RondevuService: High-level API for username claiming and service publishing with Ed25519 signatures
- Add ServiceHost: Manages offer pool for hosting services with auto-replacement
- Add ServiceClient: Connects to hosted services with automatic reconnection
- Add NoOpSignaler: Placeholder signaler for connection setup
- Integrate Ed25519 signature functionality from @noble/ed25519
- Add ESLint and Prettier configuration with 4-space indentation
- Add demo with local signaling test
- Version bump to 0.10.0

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

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

eslint.config.js

@@ -0,0 +1,52 @@
+import js from '@eslint/js'
+import tsPlugin from '@typescript-eslint/eslint-plugin'
+import tsParser from '@typescript-eslint/parser'
+import prettierConfig from 'eslint-config-prettier'
+import prettierPlugin from 'eslint-plugin-prettier'
+import unicorn from 'eslint-plugin-unicorn'
+import globals from 'globals'
+
+export default [
+    js.configs.recommended,
+    {
+        files: ['**/*.ts', '**/*.tsx', '**/*.js'],
+        languageOptions: {
+            parser: tsParser,
+            parserOptions: {
+                ecmaVersion: 'latest',
+                sourceType: 'module',
+            },
+            globals: {
+                ...globals.browser,
+                ...globals.node,
+                RTCPeerConnection: 'readonly',
+                RTCIceCandidate: 'readonly',
+                RTCSessionDescriptionInit: 'readonly',
+                RTCIceCandidateInit: 'readonly',
+                BufferSource: 'readonly',
+            },
+        },
+        plugins: {
+            '@typescript-eslint': tsPlugin,
+            prettier: prettierPlugin,
+            unicorn: unicorn,
+        },
+        rules: {
+            ...tsPlugin.configs.recommended.rules,
+            ...prettierConfig.rules,
+            'prettier/prettier': 'error',
+            '@typescript-eslint/no-explicit-any': 'off',
+            '@typescript-eslint/no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
+            'unicorn/filename-case': [
+                'error',
+                {
+                    case: 'kebabCase',
+                    ignore: ['^README\\.md$'],
+                },
+            ],
+        },
+    },
+    {
+        ignores: ['dist/**', 'node_modules/**', '*.config.js'],
+    },
+]