Migrate to kysely for real (probably)

[vcarl]

Unfortunately I don't know the precise cause of why the last attempt to roll this out didn't work. The bot didn't respond at all and it seemed potentially like it had created a new, empty database. In digging in to try again, I learned:

• migration tables had not been accounted for in the transition from Knex -> Kysely
• migrations were not being run on startup
• past migrations were not able to be re-run

Fingers crossed this works this time 🤞

[what-the-diff]

PR Summary

• Redefined Database Connection and Management
  The tech stack is updated with Kysely replacing Knex for database connection and queries. All respective changes have been accommodated in code like migration files, app modules, and helper scripts.

• Optimized Application Configuration
  The DATABASE_URL secret is now included into both Kubernetes and GitHub workflows for improved environment management. An unused import was removed for improved code cleanliness.

• Improved Code Adaptability
  The lint-staged setup is now targeting migration files for consistency in coding standards. Command for adding new type definition file to Git is also added.

• Updated Dockerfile and Kubernetes Configuration
  The latest Dockerfile now includes two new configuration files for Kysely. Also, the newbie DATABASE_URL is now set in the cluster/deployment.yaml.

• Adjusted Interface Colors
  Adjustment in color for certain interfaces from lighter to darker shades - bg-blue-500 replacing bg-blue-200 and bg-yellow-500 supplanting bg-yellow-200.

• Refactored Code and File Management
  Various files are renamed, added and removed to align with the latest changes in database connection. In specific, migration files are now implementing Kysely syntax and the knexfile is removed. New Kysely configuration file is added.

• Resolved Minor Issues
  Some small bug fixes and typo corrections in type definitions and imports. Also, the environment variable names in the app helper are updated, along with new default values.

• Updated Dependency Management
  package.json is updated to manage new dependencies required for Kysely and to add new scripts for migration and database types generation.

• Removed Unnecessary Content
  The seed file seeds/0.js, no longer needed, is removed to declutter the codebase.