[morph.ai] Fixed PLAYGROUND-PR-3559 -- Fix Kotlin syntax highlighting for class inheritance brackets

[MorphCodeBot]

This PR fixes the inconsistent syntax highlighting of brackets and colons in Kotlin class inheritance contexts.

Problem:

• Brackets were highlighted with different colors when used in class inheritance syntax
• This was particularly noticeable in VSCode markdown preview and other contexts

Changes:

• Modified the Kotlin language definition to handle colons consistently in inheritance contexts
• Updated type mode patterns to properly handle inheritance syntax
• Ensured consistent coloring of brackets and colons in class declarations

Testing:

• Verified fix using provided test case:

open class Tag

class TABLE: Tag {
  fun tr(init: TR.() -> Unit)
}

class TR: Tag {
  fun td(init: TD.() -> Unit)
}

class TD: Tag

Visual improvement:

• Brackets and colons now maintain consistent coloring throughout inheritance declarations
• Matches the expected behavior shown in the ticket's reference image

Additional ticket processing details