Import `Pattern` and `Matcher` classes from `java.util.regex` package

[f3rnandomoreno]

Update the consume function to use regex pattern for email validation and extraction

• Define a regex pattern for email validation
• Use Matcher to find and extract the email from the message text
• Handle the email of the message, ensuring only one email appears in the message

[stackblitz[bot]]

Run & review this pull request in StackBlitz Codeflow.