mf2-cli 3.0.0

The `mf2` command: init a starter application, and check, compile, fmt, stats, dump, pseudo, export/import, watch and convert a MessageFormat 2 corpus.
### The resource comment: the first of two.

### The second, joined to the first with an empty comment line.

## A group comment: detached, never a section.

# A standalone comment: a blank line follows it.

# An attached comment: it becomes the entry's.
entry-value = A message with a value

entry-attributes = A message with attributes
    .title = Its title
    .aria-label = Its label

# The comment of a message with attributes only goes on its first entry.
entry-attributes-only =
    .placeholder = Type here
    .title = Only attributes

# A term's comment goes with the term.
-term-plain = Term text
    .kind = neuter

##

entry-multiline =
    First line
      indented line
    last line