Simplify CLI command syntax.

Updated README to simplify CLI command syntax and added new optional flags for removing effects and duplicates from the text. The new commands improve clarity and usability for users.

README.md

@@ -57,17 +57,27 @@ sub.export()
 CLI
 ------------
 ```bash
-pyasstosrt --filepath=/Users/user/sub/sub.ass export
+pyasstosrt export /Users/user/sub/sub.ass
 ```
 
 **Optional** You can specify an export folder.
 ```bash
-pyasstosrt --filepath=/Users/user/sub/sub.ass export /Users/user/sub/srt
+pyasstosrt export /Users/user/sub/sub.ass --output-dir /Users/user/sub/srt
 ```
 
-**Optional** If you want to remove effects from text, you can use the --removing_effects flag.
+**Optional** If you want to remove effects from text, you can use the --remove-effects flag.
 ```bash
-pyasstosrt --filepath=/Users/user/sub/sub.ass --removing_effects=True export /Users/user/sub/srt
+pyasstosrt export /Users/user/sub/sub.ass --remove-effects --output-dir /Users/user/sub/srt
+```
+
+**Optional**  If you need to remove duplicates, you can use the --remove-duplicates flag.
+```bash
+pyasstosrt export /Users/user/sub/sub.ass --remove-duplicates
+```
+
+**Optional**  You can use the flags together --remove-duplicates --remove-effects
+```bash
+pyasstosrt export /Users/user/sub/sub.ass --remove-duplicates --remove-effects
 ```
 Installation
 ------------