tool: add a new email tool and an example agent for sending email#714

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201430098137 wants to merge 12 commits intotrpc-group:mainfrom

201430098137:feat-tool-email

Commits on Nov 21, 2025

feat(tool):implement email toolSet(send mail) and add example to use
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fix:goimports and golangci-lint and remove some test
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Commits on Nov 26, 2025