refactor(dcp-for-compaction): migrate from experimental config to hook system

- Add 'dcp-for-compaction' to HookNameSchema
- Remove dcp_for_compaction from ExperimentalConfigSchema
- Update executor.ts to use dcpForCompaction parameter
- Enable DCP by default (can be disabled via disabled_hooks)
- Update all 4 README files (EN, KO, JA, ZH-CN)

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src/hooks/anthropic-context-window-limit-recovery/executor.test.ts

@@ -151,6 +151,7 @@ describe("executeCompact lock management", () => {
       truncate_all_tool_outputs: false,
       aggressive_truncation: true,
     }
+    const dcpForCompaction = true
 
     // #when: Execute compaction with experimental flag
     await executeCompact(
@@ -160,6 +161,7 @@ describe("executeCompact lock management", () => {
       mockClient,
       directory,
       experimental,
+      dcpForCompaction,
     )
 
     // #then: Lock should be cleared even on early return