Remove dependency on `github.com/calyptia/go-bubble-table` by creating a custom table model

[everettraven]

The changes in #61 are causing some weirdness in the table headers and relying on a third-party table model is probably not the best idea here - especially as it seems to be lightly maintained. Creating a custom, generic table model for buoy's use case is likely a better path and more maintainable in the long run.

[everettraven]

Another potential option is replacing with https://github.com/Evertras/bubble-table - seems to be more maintained