feat: split api tokens into separate table

[mfontanini]

This moves nilcc-api's api tokens into a separate table so we can have more than one token per account. For now the original api_token field is still there, I'll remove that in the next change.

[github-actions]

Coverage Report for nilcc-api

Status	Category	Percentage	Covered / Total
🔵	Lines	86.73%	3883 / 4477
🔵	Statements	86.73%	3883 / 4477
🔵	Functions	82.77%	197 / 238
🔵	Branches	81.66%	343 / 420

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
nilcc-api/migrations/1771977600000-ApiTokensTable.ts	61.53%	100%	66.66%	61.53%	33-42
nilcc-api/src/data-source.ts	84.76%	84.21%	72.72%	84.76%	99-100, 112-113, 156-157, 164-174, 177-182
nilcc-api/src/account/account.controller.ts	95.5%	92.3%	100%	95.5%	143-144, 206-212
nilcc-api/src/account/account.entity.ts	100%	100%	100%	100%
nilcc-api/src/account/account.service.ts	75.77%	69.56%	88.88%	75.77%	59-60, 71-72, 92-93, 103-114, 124-128, 133-135, 145-147, 153-162
nilcc-api/src/api-token/api-token.entity.ts	100%	100%	100%	100%

Generated in workflow #176 for commit bc2303d by the Vitest Coverage Report Action