Multiple matches with wildcards

[MetalArend]

1. I think that adding this restriction is fine for now. It keeps things simple. However, I can definitely see a world where someone with a complex setup asks for the current behaviour as it would allow you to do something like this:

   version: 3
   
   tasks:
     foo-*-*:
       ..
     foo-*:
       ..

   This allows Task to do something different depending on if the user does task foo-bar vs task foo-bar-baz. This would not be possible if we errored when multiple tasks match since task-bar-baz matches both tasks in the file.

   Happy to add the error for now and revisit this later though.

Originally posted by @pd93 in #1489 (comment)

[MetalArend]

Running task do:1:2 with the following file:

tasks:
  do:*:
    vars:
      VAR1: '{{index .MATCH 0}}'
    cmds:
      - echo "{{.VAR1}}"
  do:*:*:
    vars:
      VAR1: '{{index .MATCH 0}}'
      VAR2: '{{index .MATCH 1}}'
    cmds:
      - echo "{{.VAR1}}"
      - echo "{{.VAR2}}"

results in

task: Found multiple tasks (do:, do::*) that match "do:1:2"

---

Running it with the following file:

tasks: 
  do:*:
    aliases:
      - do:*:*
    vars:
      VAR1: '{{index .MATCH 0}}'
      VAR2: '{{index .MATCH 1}}'
    cmds:
      - echo "{{.VAR1}}"
      - echo "{{.VAR2}}"

results in

template: :1:2: executing "" at <index .MATCH 1>: error calling index: reflect: slice index out of range

---

I'm not sure how this can be solved currently.