[Console] Add an hidden grep command

[lyrixx]

Description

I run very often bin/console | grep XXXX.
And I just thought, what about a builtin grep command?

bin/console grep XXXX

• The output would be more beautiful,
• We could display namespace
• I save 3 chars each time I need to search a command
• We could propose to run the command I
• We could search in hidden command too
• => Better DX

Example

Before:

$ bin/console | grep cache
 cache
  cache:clear                             Clear the cache
  cache:pool:clear                        Clear cache pools
  cache:pool:delete                       Delete an item from a cache pool
  cache:pool:list                         List available cache pools
  cache:pool:prune                        Prune cache pools
  cache:warmup                            Warm up an empty cache
  doctrine:cache:clear-collection-region  Clear a second-level cache collection region
  doctrine:cache:clear-entity-region      Clear a second-level cache entity region
  doctrine:cache:clear-metadata           Clears all metadata cache for an entity manager
  doctrine:cache:clear-query              Clears all query cache for an entity manager
  doctrine:cache:clear-query-region       Clear a second-level cache query region
  doctrine:cache:clear-result             Clears result cache for an entity manager

After

 cache
  cache:clear                             Clear the cache
  cache:pool:clear                        Clear cache pools
  cache:pool:delete                       Delete an item from a cache pool
  cache:pool:list                         List available cache pools
  cache:pool:prune                        Prune cache pools
  cache:warmup                            Warm up an empty cache
 doctrine
  doctrine:cache:clear-collection-region  Clear a second-level cache collection region
  doctrine:cache:clear-entity-region      Clear a second-level cache entity region
  doctrine:cache:clear-metadata           Clears all metadata cache for an entity manager
  doctrine:cache:clear-query              Clears all query cache for an entity manager
  doctrine:cache:clear-query-region       Clear a second-level cache query region
  doctrine:cache:clear-result             Clears result cache for an entity manager

Another examples:

[GromNaN]

Why do you use bin/console | grep XXX? If you look for a command name, console completion with fish is awesome.

[lyrixx]

1. I don't use fish
2. Completion in bash only search with the beginning of the command.

[kaznovac]

An optional parametar to the list action would be more discoverable

[derrabus]

I don't think we need this. If you want to save keystrokes, your favorite shell (yes, even bash) allows you to create aliases.

[lyrixx]

It's not only about saving keystroke. It more about having a more beautiful output.

But it's not a big deal. Let's close this one. It was juste a random idea.

I may open a PR to add an option to the list command - as suggested by @kaznovac