feat: add builtin tools for send email

[wakaka6]

Checklist:

Important

Please review the checklist below before submitting your pull request.

• Please open an issue before creating a PR or link to an existing issue need a tool for send email #10492
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

Description

Describe the big picture of your changes here to communicate to the maintainers why we should accept this pull request. If it fixes a bug or resolves a feature request, be sure to link to that issue. Close issue syntax: Fixes #<issue number>, see documentation for more details.

Fixes #10492

Implementation of tools for sending e-mail

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update, included: Dify Document
• Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade

Testing Instructions

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

[crazywoola]

Please change things below

• remove the comments in the yaml file.
• use the svg icon
• fix the lints
  :)

[wakaka6]

@crazywoola PTAL again. Thanks!

[crazywoola]

The lint action is still failing. Please make sure run the ./dev/reformat before pushing it.

[wilsonfe]

I couldn't send the email. I entered all the data and still couldn't send an email using sendgrid or Amazon SES.

In the tests, I entered an email address from the domain registered in my Amazon and Send Grid accounts. I entered the SendGrid and Amazon API passwords, as well as the password for one of the emails. All of these tests failed.
This email password issue is very confusing. Couldn't it be the API password? In any case, I tested both and neither worked.

[twinprime19]

This tool need to have the "from" address, which the user has to specify as the Verified Sender in Sendgrid. When using Sendgrid and not specifying this, sendgrid refuses. I tested my account with sendgrid directly and it works.