improve pre commit docs

docs/cli/commands/scan-install.mdx

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+---
+title: "scan install"
+description: "Add various scanning tools seamlessly into your development lifecycle"
+---
+
+```bash
+infisical scan install --pre-commit-hook
+```
+
+## Description
+The command `infisical scan install` is designed to incorporate various scanning tools seamlessly into your development lifecycle. 
+Initially, we are offering users the ability to install a pre-commit hook. This hook conducts an automatic scan for any exposed secrets in your commits before they are pushed.
+
+### Flags
+<Accordion title="--pre-commit-hook">
+  ```bash 
+  infisical scan install --pre-commit-hook
+  ```
+  
+  **Description**
+  Installs a git pre-commit hook that triggers Infisical to scan your staged changes for any exposed secrets prior to pushing.
+
+</Accordion>