[Feature] Add official website content search button

[bluewang]

Description

the official website link is: http://inlong.apache.org/

Use case

No response

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[Chever-John]

Hi, may I use algolia to finish this issue?
I think this is the docusaurus website, and it is an official search tool

[bluewang]

of course. use this： DocSearch: Search made for documentation | DocSearch by Algolia <https://docsearch.algolia.com/> ？ John Chever ***@***.***> 于2022年4月27日周三 21:28写道：

…

Hi, may I use algolia to finish this issue? — Reply to this email directly, view it on GitHub <#1831 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AVAW37SCM2GQVFVBJFY4HHLVHE6JLANCNFSM5IVBBNFA> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[Chever-John]

@bluewang OK, Please assign it to me. I want to try~

[dockerzhang]

@Chever-John thanks.
the office website project is at
https://github.com/apache/incubator-inlong-website/

we can refer to https://skywalking.apache.org/

[dockerzhang]

@Chever-John do you still work on this issue?

[Chever-John]

@dockerzhang Yes, I got the relevant permission code a week ago, but I have to defend my thesis this week and I plan to have this done by the 10th of June.

[Chever-John]

This task is in progress.
Sorry for the delay in this task!