fix: Adjust Indent Position

[notJoon]

Description

Improve snippet formatting by removing common indent prefix from code lines.

• Modify AddCodeSnippet builder function to remove the common indentation before displaying each line.
• Adjust underline positioning to match the new indentation:
  • Update AddUnderlineAndMessage to account for the removed indentation level.

Before

Simplified output; dots are indicates the indentation

 1 | ....if foo() {
 2 | ........println()
 3 | ....} 

After

 1 | if foo()
 2 | ....println()
 3 | }