Create and implement flamethrower weapon

[ShadowBrian]

• [x] Create model
• [x] Create "Fire emit component"
• [x] Modify fire helper to allow for precise fire emission
• [x] Set up weapon prefab

https://cdn.discordapp.com/attachments/937825802073022595/1113433700890333215/sbox-dev_Dj0oFkD0cX.mp4

[matekdev]

nice work finished