Introduced include to filter files considered by watch

[ndeloof]

What I did

Introduce include to only select a subset of files in source path for watch command.
Illustration example:

services:
  base:
    build:
      context: .
      dockerfile_inline: |
        FROM nginx
    develop:
      watch:
        - path: .
          include: "*.txt" # can also be an array
          action: rebuild

Related issue
closes #12544
see compose-spec/compose-go#747

(not mandatory) A picture of a cute animal, if possible in relation to what you did

[ndeloof]

it would be nicer path can be set as a pattern, need to investigate we can support this

[ndeloof]

cc @jhrotko

[jhrotko]

@ndeloof so in this case can path be a pattern? In my PR I made this work.
In this case can you handle in this PR glob pattern for folders such as path: app/*/sub?

[ndeloof]

@jhrotko no it can't - this is intentional at this stage, as we need a base path to start collecting filesystem events, I'm investigating if we could get rid of this for better UX

About pattern for folder:

    develop:
      watch:
        - path: app
          include: "*/sub"
          action: rebuild

(see https://docs.docker.com/build/concepts/context/#syntax about actual pattern syntax)

[ndeloof]

@glours added a dedicated e2e test

[glours]

LGTM