docs: update readme with new installation methods and cli options

src/llm/mod.rs

@@ -136,8 +136,9 @@ impl LlmClient {
         &self,
         version: &str,
         commits: &[String],
+        language: Language,
     ) -> Result<String> {
-        let system_prompt = TAG_MESSAGE_SYSTEM_PROMPT;
+        let system_prompt = get_tag_system_prompt(language);
         let commits_text = commits.join("\n");
         let prompt = format!("Version: {}\n\nCommits:\n{}", version, commits_text);
         
@@ -149,8 +150,9 @@ impl LlmClient {
         &self,
         version: &str,
         commits: &[(String, String)], // (type, message)
+        language: Language,
     ) -> Result<String> {
-        let system_prompt = CHANGELOG_SYSTEM_PROMPT;
+        let system_prompt = get_changelog_system_prompt(language);
         
         let commits_text = commits
             .iter()
@@ -385,6 +387,30 @@ fn get_commit_system_prompt(format: crate::config::CommitFormat, language: Langu
     }
 }
 
+fn get_tag_system_prompt(language: Language) -> &'static str {
+    match language {
+        Language::Chinese => TAG_MESSAGE_SYSTEM_PROMPT_ZH,
+        Language::Japanese => TAG_MESSAGE_SYSTEM_PROMPT_JA,
+        Language::Korean => TAG_MESSAGE_SYSTEM_PROMPT_KO,
+        Language::Spanish => TAG_MESSAGE_SYSTEM_PROMPT_ES,
+        Language::French => TAG_MESSAGE_SYSTEM_PROMPT_FR,
+        Language::German => TAG_MESSAGE_SYSTEM_PROMPT_DE,
+        _ => TAG_MESSAGE_SYSTEM_PROMPT,
+    }
+}
+
+fn get_changelog_system_prompt(language: Language) -> &'static str {
+    match language {
+        Language::Chinese => CHANGELOG_SYSTEM_PROMPT_ZH,
+        Language::Japanese => CHANGELOG_SYSTEM_PROMPT_JA,
+        Language::Korean => CHANGELOG_SYSTEM_PROMPT_KO,
+        Language::Spanish => CHANGELOG_SYSTEM_PROMPT_ES,
+        Language::French => CHANGELOG_SYSTEM_PROMPT_FR,
+        Language::German => CHANGELOG_SYSTEM_PROMPT_DE,
+        _ => CHANGELOG_SYSTEM_PROMPT,
+    }
+}
+
 // System prompts for LLM
 
 const CONVENTIONAL_COMMIT_SYSTEM_PROMPT: &str = r#"You are a helpful assistant that generates conventional commit messages.