Divided analyzing logic into submodules.

[data-pup]

This breaks the different parts of analyze.rs into separate files.

The different analyses are grouped together in analyze::commands, to differentiate them from the files that are responsible for formatting output into text tables or JSON, which are found in analyze::formats. The different analyses, i.e. top, diff, and so forth are re-exported from analyze.rs using a pub use statement.

Aside from organizational work, this commit as few changes as possible to the code itself. The only changes made are:

• For the sake of differentiating between imports coming from other crates within the project, the extern crate statements in analyze.rs do not alias the other twiggy crates. These are aliased when they are imported within the commands files, so that no other code changes.
• Imports at the top of files within analyze::commands are divided into 3 groups, following advice from this issue. Imports from standard libraries come first, followed by imports from external crates, and imports from other crates in the project coming third.
• The with_header and add_row methods for the formats::Table struct have had the pub keyword added, so they can be used in the commands submodule. This module is not publicly exported from the analyze crate however, so I don't believe this has an effect on their visibility elsewhere.

[fitzgen]

The with_header and add_row methods for the formats::Table struct have had the pub keyword added, so they can be used in the commands submodule. This module is not publicly exported from the analyze crate however, so I don't believe this has an effect on their visibility elsewhere.

Just to be double sure, we can mark these as pub(crate) fn blah()

[fitzgen]

Thanks @data-pup!

My one and only nitpick is that "commands" are what the user does, but this crate is a bit removed from the user and is performing different kinds of analyses.

I am being totally unreasonable, but I would really prefer if the commands submodule were renamed to analyses :-p

Thanks again! This is a great code organization clean up!

[fitzgen]

r+ with that change, feel free to merge when its done!

[data-pup]

am being totally unreasonable, but I would really prefer if the commands submodule were renamed to analyses :-p

Not unreasonable at all! Funnily enough, I had named that submodule analyses at the outset, but wasn't originally sure about it. Glad to know my instinct was right! I'll take care of this, and the pub(crate) detail mentioned above, and merge this after CI passes 😄

Thanks for the review!