[ECO-2544] Clean up package code before publishing; remove lots of unused code

[xbtmatt]

Description

• Output emojis as a typescript file directly, cleans up our ts base and reduces packed size by ~20kb
• Ensure the emojis are written to the *-emojis.ts (chat/symbol) files as emojis, not \u0123 encoded strings
• Exclude tests from the final build
• Move test utils to the tests folder
• add a prepublish command
• Remove lots of unused code (I manually combed through the whole SDK)
• Separated tsconfig.json to have a .prod. version that's solely for publishing
• Added prepublishOnly (only run on publish)
• Added back in dist folder- that's just a thing for axios because tons of people download Axios through a CDN on GitHub at runtime rather than building the package. No one is going to be downloading our SDK with a CDN instead of just building it into their frontend. The diff in our repo will be a huge mess, so I've excluded it again
• Remove mqtt.ts

Testing

SDK tests. I've almost entirely removed functions outright- I didn't alter any intra-function code, so everything should continue to work if the SDK continues to build.

Checklist

• Did you update relevant documentation?
• Did you add tests to cover new code or a fixed issue?
• Did you update the changelog?
• Did you check all checkboxes from the linked Linear task?

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Name	Status	Preview	Comments	Updated (UTC)
emojicoin-dot-fun	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 5, 2024 9:22pm
emojicoin-dot-fun-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 5, 2024 9:22pm