Unify data entry into the app

[oubiwann]

Right now there are several points of entry for data:

• Config
• CLI flags
• Environment variables
• Constants
• Clap defaults
• Module-level defaults

The logic around that data is spread out and needs to be unified. Some include:

• general util functions
• App methods
• DB methods
• Clap matching/extracting functions

Features/tasks:

• Create a new input module and gather existing input-specific modules in it (including config stuff)
• Identify all current use of config in rucksack-lib (checking for possible cyclic deps) and move to input module
• Establish order of precedence for ENV vars, config file values, CLI options, module-level defaults, etc.
• Ensure (with tests) that ENV vars for all CLI flags work as expected, according to established order of precedence
• Model input data
  • create a new input/model.rs module
  • move current config "schemas" here
  • add input model structs for all applicable CLI flags that currently do not have one
  • implement methods/utility functions for merging/unifying the various input data sources and populating the model structs
• Remove all defaults from CLI options
• Implement defaults in input module
• For all applicable input model structs items that currently do not have CLI flags, create CLI flags
• Update the entire app to ONLY use the input model for all data

The above changes have resulted in some bugs that popped up:

• Fix issue with db files not being loaded because the CLI assumes a given command doesn't require DB access (this is true of very few commands, e.g., for rucksack gen)
• Fix the issue where password history cannot be properly displayed in the CLI
• Fix the issue of querying type any and category any don't actually match any of their respective fields

[oubiwann]

Maybe an input module in rucksack-lib to unify these?