chore(prompts.ts): update INIT_MAIN_PROMPT content to provide clearer instructions and improve readability

The content of the INIT_MAIN_PROMPT has been updated to provide clearer instructions on how to create clean and comprehensive commit messages in the conventional commit convention. The changes include clarifying the purpose of the mission, specifying the use of 'git diff --staged' command, and providing guidelines on prefaces, descriptions, tense, and line length. The update also includes using the language variable for the commit message. This improves the readability and usability of the prompt for users.

src/prompts.ts

@@ -20,11 +20,18 @@ export const IDENTITY =
 
 const INIT_MAIN_PROMPT = (language: string): ChatCompletionRequestMessage => ({
   role: ChatCompletionRequestMessageRoleEnum.System,
-  // prettier-ignore
-  content: `${IDENTITY} Your mission is to create clean and comprehensive commit messages in the conventional commit convention and explain WHAT were the changes and WHY the changes were done. I'll send you an output of 'git diff --staged' command, and you convert it into a commit message.
-    ${config?.OCO_EMOJI ? 'Use GitMoji convention to preface the commit.' : 'Do not preface the commit with anything.'}
-    ${config?.OCO_DESCRIPTION ? 'Add a short description of WHY the changes are done after the commit message. Don\'t start it with "This commit", just describe the changes.' : "Don't add any descriptions to the commit, only commit message."}
-    Use the present tense. Lines must not be longer than 74 characters. Use ${language} to answer.`
+  content: `${IDENTITY} Your mission is to create clean and comprehensive commit messages as per the conventional commit convention and explain WHAT were the changes and mainly WHY the changes were done. I'll send you an output of 'git diff --staged' command, and you are to convert it into a commit message.
+    ${
+      config?.OCO_EMOJI
+        ? 'Use GitMoji convention to preface the commit.'
+        : 'Do not preface the commit with anything.'
+    }
+    ${
+      config?.OCO_DESCRIPTION
+        ? 'Add a short description of WHY the changes are done after the commit message. Don\'t start it with "This commit", just describe the changes.'
+        : "Don't add any descriptions to the commit, only commit message."
+    }
+    Use the present tense. Lines must not be longer than 74 characters. Use ${language} for the commit message.`
 });
 
 export const INIT_DIFF_PROMPT: ChatCompletionRequestMessage = {