HMTV2-8: Add team creation with unique team code and name validation

[YahyaAsmara]

Things I did:

• Add teamCode field to organization table for unique team codes
• Create team router with create mutation
• Validate team names (alphanumeric, spaces, hyphens, underscores only - especially no emojis)
• Team creator is automatically added as owner/leader

Things I did not do as much yet:

• Test if all instances/teams/names works as intended
• Test if current logic makes sense (maybe missing 1 or 2 edge cases)

Things I have questions of:

• I have used https://nodejs.org/api/crypto.html currently but I am not sure if there is a better alternative
• I am not sure if we still want to do 4 char teamId's or not. I currently have set it at 8.

[skand088]

you have some biome errors - check pipeline and fix those pls.

[skand088]

consider making this an enum instead of hardcoding strings

[skand088]

consider wrapping this insert and the team insert in a transaction so that they act atomically.

https://stackoverflow.com/questions/974596/what-is-a-database-transaction