Compress 3 spaces down to 2

[vcarl]

I spotted a weirdo formatted post that used spaces to emulate bullet points, which is bananas, but it also broke the markdown formatter. Discord doesn't support the 4-spaces-for-code markdown format, so this is fine.

[what-the-diff]

PR Summary

• Implementation of a New Function - 'compressSpaces'
  A new function named compressSpaces has been introduced in the string helper module. Its primary role is to eliminate excessive spacing in text data by replacing any sequence of three or more spaces with just two spaces. This function will repeatedly perform this action until no more sequences of excessive spaces exist.

• Updating Import Statements in 'server.ts'
  The import statements in the src/server.ts file have been updated to include the newly created compressSpaces function from the string helper module.

• Enhancements in the 'renderPost' Function
  The processing of post.description in the renderPost function (in src/server.ts) has been improved. Now, before rendering the post description, the function first compresses any excessive spaces using the newly included compressSpaces function, and then it compresses line breaks. This streamlining in processing will result in cleaner, more comprehensible post descriptions.