Adding Ragga and other tweaks before 2024 camp

[BirchBirchBirch]

Adding the RoR tune Ragga and making corresponding small changes such as adding some established starter/alt parts ahead of this year's band camp

More specifically:

• Added Ragga
• Removed Kickbacks and Zorro from More Breaks (as they're now in Ragga)
• Removed Yala Break from More Breaks as it hasn't caught on
• Added two-stick Alt Repi for Afoxé and Wolf and two-stick Starter Repi to Funk
• Removed Jericho Alt Repi line that never caught on
• Amended Call Break/Clave Call to Circle Break for Samba Reggae, added example of tune slowed down and swung (Reggae Samba)
• Moved specifically RoR tune controversies to Background, foregrounding XR Rhythms tune controversies (Angela Davis, Jericho)
• Added origins of general breaks and list of non-RoR general breaks under Background in More Breaks
• Added origins of alt/starter parts for various tunes and their difficulty
• Updated PDFs of Hedgehog and Samba Reggae
• Minor miscellaneous text file tidying

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[timrog]

Hi @BirchBirchBirch. Mark this as ready for review whenever it's ready and I'll merge it. Thanks