feat(heap): add go codes

[Reanon]

If this PR is related to coding or code translation, please fill out the checklist.

• I've tested the code and ensured the outputs are the same as the outputs of reference codes.
• I've checked the codes (formatting, comments, indentation, file header, etc) carefully.
• The code does not rely on a particular environment or IDE and can be executed on a standard system (Win, macOS, Ubuntu).

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1 Ignored Deployment

Name	Status	Preview	Updated
hello-algo	⬜️ Ignored (Inspect)		Jan 13, 2023 at 9:41AM (UTC)

[krahets]

Thanks! Could you help copy the code to heap.md?

I'm afraid to make a mistake due to a lack of knowledge in Go.

[Reanon]

Thanks! Could you help copy the code to heap.md?

I'm afraid to make a mistake due to a lack of knowledge in Go.

Codes will be append in next commit.

[krahets]

Two more comments, thanks!