feat: enable dynamic truncation for all tool outputs by default (#226)

- Change truncate_all_tool_outputs default from false to true
- Update schema.ts to use .default(true) instead of .optional()
- Update documentation in all README files (EN, KO, JA, ZH-CN)
- Rebuild JSON schema with new default value

This prevents prompts from becoming too long by dynamically truncating
all tool outputs based on context window usage. Users can opt-out by
setting experimental.truncate_all_tool_outputs to false.

Co-authored-by: sisyphus-dev-ai <sisyphus-dev-ai@users.noreply.github.com>

src/config/schema.ts

@@ -115,7 +115,7 @@ export const ExperimentalConfigSchema = z.object({
   /** Threshold percentage to trigger preemptive compaction (default: 0.80) */
   preemptive_compaction_threshold: z.number().min(0.5).max(0.95).optional(),
   /** Truncate all tool outputs, not just whitelisted tools (default: true) */
-  truncate_all_tool_outputs: z.boolean().optional(),
+  truncate_all_tool_outputs: z.boolean().default(true),
 })
 
 export const OhMyOpenCodeConfigSchema = z.object({