feat: Reveal tokens subcommand

[jawnsy]

• Mark tokens subcommand as visible
• Re-generate Markdown documentation for the commands
• Add JSON output for "tokens ls" command, as with "envs ls"
• Add integration test cases

Tested the commands:

[coder@jawnsy-m docs]$ coder tokens ls -o json
warning: version mismatch detected
  | Coder CLI version: unknown
  | Coder API version: 1.14.0+351-gb3b505259-20210124
  | 
  | tip: download the appropriate version here: https://github.com/cdr/coder-cli/releases
[{"id":"RQAv4Tvhiw","name":"abc","application":true,"user_id":"6006fa81-d49b8c0d52e920fe40f5ca90","last_used":"0001-01-01T00:00:00Z"},{"id":"rAvv33PmmY","name":"","application":false,"user_id":"6006fa81-d49b8c0d52e920fe40f5ca90","last_used":"2021-01-22T21:19:58.65074Z"},{"id":"XTCWEeOvoo","name":"","application":false,"user_id":"6006fa81-d49b8c0d52e920fe40f5ca90","last_used":"2021-01-25T00:13:34.62261Z"},{"id":"vl7pIPT8dX","name":"","application":false,"user_id":"6006fa81-d49b8c0d52e920fe40f5ca90","last_used":"2021-01-25T00:22:36.56265Z"}]
[coder@jawnsy-m docs]$ coder tokens create abcdef
warning: version mismatch detected
  | Coder CLI version: unknown
  | Coder API version: 1.14.0+351-gb3b505259-20210124
  | 
  | tip: download the appropriate version here: https://github.com/cdr/coder-cli/releases
Oo6zFqfK3t-tvUWLtWQPY5Qrj4s14E1Rq
[coder@jawnsy-m docs]$ coder tokens ls
warning: version mismatch detected
  | Coder CLI version: unknown
  | Coder API version: 1.14.0+351-gb3b505259-20210124
  | 
  | tip: download the appropriate version here: https://github.com/cdr/coder-cli/releases
ID            Name      Application    UserID                               LastUsed                               
Oo6zFqfK3t    abcdef    true           6006fa81-d49b8c0d52e920fe40f5ca90    0001-01-01 00:00:00 +0000 UTC          
RQAv4Tvhiw    abc       true           6006fa81-d49b8c0d52e920fe40f5ca90    0001-01-01 00:00:00 +0000 UTC          
rAvv33PmmY              false          6006fa81-d49b8c0d52e920fe40f5ca90    2021-01-22 21:19:58.65074 +0000 UTC    
XTCWEeOvoo              false          6006fa81-d49b8c0d52e920fe40f5ca90    2021-01-25 00:13:34.62261 +0000 UTC    
vl7pIPT8dX              false          6006fa81-d49b8c0d52e920fe40f5ca90    2021-01-25 00:22:36.56265 +0000 UTC    
[coder@jawnsy-m docs]$ coder tokens regen Oo6zFqfK3t
warning: version mismatch detected
  | Coder CLI version: unknown
  | Coder API version: 1.14.0+351-gb3b505259-20210124
  | 
  | tip: download the appropriate version here: https://github.com/cdr/coder-cli/releases
Oo6zFqfK3t-r9OHpN1h6BJPhnHWFIYbD3
[coder@jawnsy-m docs]$ coder tokens rm Oo6zFqfK3t
warning: version mismatch detected
  | Coder CLI version: unknown
  | Coder API version: 1.14.0+351-gb3b505259-20210124
  | 
  | tip: download the appropriate version here: https://github.com/cdr/coder-cli/releases
[coder@jawnsy-m docs]$ coder tokens ls
warning: version mismatch detected
  | Coder CLI version: unknown
  | Coder API version: 1.14.0+351-gb3b505259-20210124
  | 
  | tip: download the appropriate version here: https://github.com/cdr/coder-cli/releases
ID            Name    Application    UserID                               LastUsed                               
RQAv4Tvhiw    abc     true           6006fa81-d49b8c0d52e920fe40f5ca90    0001-01-01 00:00:00 +0000 UTC          
rAvv33PmmY            false          6006fa81-d49b8c0d52e920fe40f5ca90    2021-01-22 21:19:58.65074 +0000 UTC    
XTCWEeOvoo            false          6006fa81-d49b8c0d52e920fe40f5ca90    2021-01-25 00:13:34.62261 +0000 UTC    
vl7pIPT8dX            false          6006fa81-d49b8c0d52e920fe40f5ca90    2021-01-25 00:22:36.56265 +0000 UTC

[shortcut-integration]

This pull request has been linked to Clubhouse Story #6470: Reveal (and document) coder tokens.

[bpmct]

nice!

[jawnsy]

@cmoog Something from the above output that I'm a bit unsure about, the tokens listed are partial (only the part before the hyphen), so even though regen changes the key (the latter part changes), the coder tokens ls output looks the same. I assume this is as designed but figured I should highlight it to you just in case.