feat: add plan2code-bot with --resume capability and state cleanup

Add the autonomous workflow test runner (plan2code-bot) that uses the
Claude Agent SDK to run plan2code end-to-end. Includes --resume flag
to continue incomplete runs from saved state, and automatic state file
cleanup on successful completion.

plan2code-bot/src/types.ts

@@ -0,0 +1,27 @@
+export type BotMode = 'new-project' | 'enhancement';
+
+export interface BotConfig {
+  workDir: string;
+  projectDir: string;
+  ideaDescription: string;
+  ideaName: string;
+  mode: BotMode;
+}
+
+export type StepName = 'init' | 'plan' | 'document' | 'implement' | 'finalize';
+
+export interface StepResult {
+  step: StepName;
+  success: boolean;
+  sessionId: string | null;
+  duration: number;
+  error: string | null;
+}
+
+export interface BotState {
+  config: BotConfig;
+  steps: StepResult[];
+  currentStep: StepName | null;
+  implementPasses: number;
+  allPhasesComplete: boolean;
+}