feat(rewrite): bootstrap monorepo Bun + port domain layer ke TypeScript

Mulai migrasi Zesdex dari Rust ke TypeScript/Bun.

- Root workspace package.json, tsconfig strict, bun.lock, gitignore fix
- Paket @zesdex/domain (apps/packages/domain):
  - core: ChatMessage/Conversation/ToolCall/SseParser/repairJson/
    sanitizeToolArguments/UsageStats/Store/DomainError
  - auth: Session/SessionId/SessionLock/OAuth + repository & service interfaces
  - cms: AppConfig/Settings/SettingsPatch/Memory/EditLog + repository &
    service interfaces
  - agent: TurnEvent/SessionRuntime/AgentTurnParams/AgentProgress/prompt
  - subagent & workflow models
- Wire-shape JSON disamakan dengan Rust (serde rename/flatten/skip_if)
- 27 unit test Bun port dari test Rust (SseParser, repair_json, resolve_effective_model, session id)

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

bun.lock

@@ -0,0 +1,34 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "zesdex",
+      "devDependencies": {
+        "@types/bun": "^1.2.0",
+        "typescript": "^5.7.0",
+      },
+    },
+    "apps/packages/domain": {
+      "name": "@zesdex/domain",
+      "version": "1.21.2",
+      "devDependencies": {
+        "@types/bun": "^1.2.0",
+        "typescript": "^5.7.0",
+      },
+    },
+  },
+  "packages": {
+    "@types/bun": ["@types/bun@1.4.0", "", { "dependencies": { "bun-types": "1.4.0" } }, "sha512-K+lZULY23vRgK/CfTjFIV+tyifaNdSMlPh9j+6mQ/cLfpOznLyAuzgV/JQysyECpkBQLVMSyvjlr2fBUSA9wFQ=="],
+
+    "@types/node": ["@types/node@26.4.1", "", { "dependencies": { "undici-types": "~8.3.0" } }, "sha512-k97ENvZWtvA6yqz5/FS6a7duDgOPEeOQOc2iKS/nY6mX6qJUKtLnWzQS+Xj6tXweyj6ZcTAK2Qecetnvi9nCLA=="],
+
+    "@zesdex/domain": ["@zesdex/domain@workspace:apps/packages/domain"],
+
+    "bun-types": ["bun-types@1.4.0", "", { "dependencies": { "@types/node": "*" } }, "sha512-iIKw23BspnQQYd3prITOBxeUsxBHnwzX6YJfGMuNOZzeNcMmVqzIIVGRm1l69ogaPQmb4wB6BN8mA5bE9YuC5Q=="],
+
+    "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
+
+    "undici-types": ["undici-types@8.3.0", "", {}, "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ=="],
+  }
+}