feat: add cursorColor and cursorColorOnTarget props to TargetCursor

[calebephrem]

In Short

Added two new optional props to TargetCursor for customizing cursor color:

• cursorColor: sets the dot/corner color at rest
• cursorColorOnTarget: changes the cursor color to this color while hovering a .cursor-target element, and back to cursorColor on leave

Why

Currently the cursor is hardcoded to white, with no way to make it match a website's accent colors

Changes

• Added cursorColor / cursorColorOnTarget props (both optional and backward compatable)
• Color transitions handled via gsap.to(..., { borderColor / backgroundColor }) on enter/leave, with a short 0.15s duration to keep it subtle
• Scoped existing gsap.killTweensOf(corner) calls to x,y so they no longer clobber the new color tweens

Usage

<TargetCursor cursorColor="#ffffff" cursorColorOnTarget="#818cf8" />

Tested

• Verified hover enter/leave color transitions on multiple .cursor-target elements in sequence
• Verified default behavior is unchanged when cursorColor/cursorColorOnTarget are omitted
• Verified corner position animations (drag-to-corner, parallax) still work correctly alongside the new color tweens

Happy to adjust durations, naming or anything else if you want.
Let me know if so!