Feat/better inspect output 2720

[rosalinekarr]

Problem

The output from the inspect commands are difficult to read by default.

Solution

Use pretty-printed json for text output, and maintain compact json for use with the --enc=json flag.

Resolves #2720

[frrist]

I don't think the text encoder should be outputting json. I would prefer it output a table, or even just plain text. Here are some examples of what I am thinking:

$ go-filecoin inspect disk
Disk:
| key    | value       |
|--------|-------------|
| FSType | 61267       |
| Free   | 856702431232|
| Total  | 805490962432|

or

$ go-filecoin inspect disk
Disk
FSType: 61267
Free:   856702431232
Total:  805490962432

If a user wants the output of a command to be pretty printed they can achieve this using jq, e.g.

$ go-filecoin inspect disk | jq
{
  "FSType": "61267",
  "Free": 856702431232,
  "Total": 805490962432
}

[frrist]

I would prefer the changes I have described in my previous comment.

[rosalinekarr]

@frrist Comments addressed

[frrist]

one blocking comment, then lgtm

[acruikshank]

LGTM