Improved success output for create-turbo

[seanyusa]

Improved success output for create-turbo namely for the current directory use case. (Follow-up task to #212)

Items changed (since indentation was changed so diff is not as easy to parse):

• removed the if (projectDirIsCurrentDir) block, inlined the else logs
• check projectDirIsCurrentDir wherever relativeProjectDir is used in the logs
• changed docs link from https://turborepo.org -> https://turborepo.org/docs

Before

After

(notice no cd ... lines in the success output as we are already in the project directory)

Non-current directory case still works

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[jaredpalmer]

Nice