Fletching refactor

What has been done in this MR?

• I've refactored fletching
• I've removed all files that are unused
• I've converted any java I see into Kotlin
• Generally, I have tried to put emphasis on readability
• Convert skill pulses to queueScripts
• Migrate any available function calls to content API

Please be gentle, this is my first OSS PR ヾ(ﾟдﾟ)ﾉ゛

Having said that, if this requires a retest of fletching anyway, may as well get it as good as we can.

Apologies for the hefty PR, I got a bit excited when I started, I can try break into smaller chunks if required

What should testers check?

• Basically all fletching crafts
  • Carving logs with knives
  • Crafting a mithril grapple
  • Attaching feathers to shafts
  • Limbing crossbows
  • Attaching heads to flighted arrows
  • Attaching feathers to darts
  • Attaching feathers to bolts
  • Attaching limbs to crossbow stocks
  • Chiselling gems to tips
  • Attaching gem tips to bolts
  • Stringing bows
  • Stringing crossbows

• I have tested these changes thoroughly.
• I used the relevant Zaros tool for any JSON edits where possible, and have attached screenshots of any changes.