chore(idea): translate the Chinese comments in services/

Part of #1419. Ready to start — no open pull request touches extensions/idea/.

Scope

Translate the Chinese comments under extensions/idea/src/main/kotlin/com/alibaba/opencodereview/idea/services/ (252 flagged lines across 11 files). Leave allowedPrefixes alone; #1424 removes the extensions/idea/ entry once every idea sub-issue is merged.

Files

Lines	File (under .../idea/services/)
81	GitService.kt
45	CliService.kt
29	GitMap.kt
25	ConfigService.kt
22	ShellEnv.kt
18	ConfigDraft.kt
7	ConfigParse.kt
7	ConfigUtils.kt
6	CliParse.kt
6	Providers.kt
6	ReviewSession.kt

ShellEnv.kt and CliService.kt carry the reasoning about PATH resolution under nvm and about process-tree termination. Translate that reasoning, do not summarise it away.

Done when

• Temporarily dropping the extensions/idea/ exemption no longer reports any file under services/.
• ./gradlew test -PskipFrontend=true passes in extensions/idea.