A_CONTAINS with cql2_text throws error

**Description**

I noticed `A_CONTAINS` doesn't work with cql2_text, though cql2_json can parse it.

**Steps to Reproduce**
Steps to reproduce the behavior:

```
> from pygeofilter.parsers.cql2_text.parser import parse
> parse("A_CONTAINS('values', ('a', 'b', 'c'))")
Traceback (most recent call last):
File "~/pygeofilter/.venv/lib/python3.12/site-packages/lark/parsers/lalr_parser_state.py", line 77, in feed_token
action, arg = states[state][token.type]
~~~~~~~~~~~~~^^^^^^^^^^^^
KeyError: 'COMMA'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "", line 1, in
File "~/pygeofilter/pygeofilter/parsers/cql2_text/parser.py", line 212, in parse
return parser.parse(cql_text)
^^^^^^^^^^^^^^^^^^^^^^
File "~/pygeofilter/.venv/lib/python3.12/site-packages/lark/lark.py", line 677, in parse
return self.parser.parse(text, start=start, on_error=on_error)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "~/pygeofilter/.venv/lib/python3.12/site-packages/lark/parser_frontends.py", line 131, in parse
return self.parser.parse(stream, chosen_start, **kw)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "~/pygeofilter/.venv/lib/python3.12/site-packages/lark/parsers/lalr_parser.py", line 42, in parse
return self.parser.parse(lexer, start)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "~/pygeofilter/.venv/lib/python3.12/site-packages/lark/parsers/lalr_parser.py", line 88, in parse
return self.parse_from_state(parser_state)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "~/pygeofilter/.venv/lib/python3.12/site-packages/lark/parsers/lalr_parser.py", line 111, in parse_from_state
raise e
File "~/pygeofilter/.venv/lib/python3.12/site-packages/lark/parsers/lalr_parser.py", line 102, in parse_from_state
state.feed_token(token)
File "~/pygeofilter/.venv/lib/python3.12/site-packages/lark/parsers/lalr_parser_state.py", line 80, in feed_token
raise UnexpectedToken(token, expected, state=self, interactive_parser=None)
lark.exceptions.UnexpectedToken: Unexpected token Token('COMMA', ',') at line 1, column 26.
Expected one of:
* RPAR
```

**Expected behavior**

It should output this (per output of cql2_json for the same statement as json):

```
> from pygeofilter.parsers.cql2_text.parser import parse
> parse({"op": "a_contains", "args": [{"property": "values"}, ['a', 'b', 'c']]})
ArrayContains(lhs=ATTRIBUTE values, rhs=['a', 'b', 'c'])
```

**Screenshots/Tracebacks**
If applicable, add screenshots to help explain your problem.

**Environment**
- OS: OSX (Tahoe 26)
- Python version: 3.12
- pygeoapi version: 0.4.0 on master (commit 6c8ebac75100cddf7df7a38c305964116ffac527)

**Additional context**
Add any other context about the problem here.

Start at pygeofilter/parsers/cql2_text/parser.py and reproduce the failing A_CONTAINS expression shown in the issue. Compare its handling with the equivalent cql2_json input, then verify that cql2_text returns ArrayContains with the attribute and list values instead of raising UnexpectedToken.

Written by the indexing model from the issue text.