Implement big fish

What has been done in this MR?

• Big bass, shark, and swordfish are now obtainable from fishing. Fixes #1620 (closed).
• The message for catching shark now ends with an authentic exclamation mark. Source: https://www.youtube.com/watch?v=CYSa1vxP3bU
• The fishing skill cape perk now, correctly IMO, also logs catching a second fish in your number of fish caught

What should testers check?

• That you are able to obtain big bass, shark, swordfish
• That the messages are correct
• Anything else (e.g. normal fishing) should not regress

Notes for info:

• Dev builds have the rate for big fish boosted to 1 in 10 (from 1 in 5000)
• The fishing skill cape perk will always award a regular fish, even if your primary fishing action had rolled a big one

• I have tested these changes thoroughly.

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