Rename ie to if-run

[zanete]

What:

Rename ie to if-run

Why:

Sub of #650 (to align with the names of the additional tools being built)
Now we have if-diff and if-env and soon -if-check we should update ie to use the if- prefix.

Scope of work:

• rename ie to if-run
• update all docs and examples

Acceptance Criteria:

• -iecommand is renamed toif-run`

GIVEN the change is applied
WHEN I run if-run -m <manifest> --stdout
THEN I should receive the computed manifest to the console

• docs are up to date
  GIVEN the docs are updated
  WHEN I search for ie across the IF readme, if-docs pages and tutorials
  THEN I should not find any instances of ie because they have all been replaced with if-run