UPPERCASE: Converts all text to uppercase.
lowercase: Converts all text to lowercase.
Title Case: Capitalizes the first letter of each word.
Sentence case: Capitalizes the first letter of each sentence.
aLtErNaTiNg CaSe: Alternates between lowercase and uppercase for each character.
Reverse Text: Reverses the order of characters in the text.
Remove Extra Spaces: Removes extra spaces between words and trims leading/trailing spaces.
Copy to Clipboard: Copies the transformed text to the clipboard.
Clear Text: Clears the input field.
Text Persistence: Saves the entered text locally, so it's still there when the user reopens the extension.
