feat: Add support for AsyncFor

[JoshuaGlaZ]

Pull Request description

This PR adds support for AsyncFor constructs from the issue #196.

How to test these changes

run the below code

$ pytest tests/test_collections.py
$ pytest pytest tests/tools/transpilers/test_python.py

import astx
from astx.tools.transpilers import python as astx2py
from astx.viz import traverse_ast_ascii, graph_to_ascii

transpiler = astx2py.ASTxPythonTranspiler()

block_ = astx.Block()
block_.append(astx.LiteralString("pass"))

var_x = astx.InlineVariableDeclaration(
    "x", type_=astx.Int32(), value=astx.LiteralInt32(-1)
)

var_y = astx.LiteralInt32(5)

asyncfor_expr = astx.AsyncForRangeLoopExpr(
    variable=var_x, start=None, end=var_y, step=None, body=block_
)
asyncfor_expr

generator = astx2py.ASTxPythonTranspiler()
generated_code = generator.visit(asyncfor_expr)
print(generated_code)

dot_graph = traverse_ast_ascii(asyncfor_expr.get_struct(simplified=True))
graph = graph_to_ascii(dot_graph)
print(graph)

Output:

result = ['pass' async for x in range(0, 5, 1)]

Pull Request checklists

Note:

• Share updated images of the graph representation of the new ASTx node
  proposed in this PR, in both image and ASCII formats. For more
  information, check this Google Colab notebook:
  https://colab.research.google.com/drive/1xXwHmOMkJKFSmhRvn4WYfSAsdDzMnawf?usp=sharing

This PR is a:

• bug-fix
• new feature
• maintenance

About this PR:

• it includes tests.
• the tests are executed on CI.
• the tests generate log file(s) (path).
• pre-commit hooks were executed locally.
• this PR requires a project documentation update.

Author's checklist:

• I have reviewed the changes and it contains no misspelling.
• The code is well commented, especially in the parts that contain more
  complexity.
• New and old tests passed locally.

Additional information

Reviewer's checklist

Copy and paste this template for your review's note:

## Reviewer's Checklist

- [x] I managed to reproduce the problem locally from the `main` branch
- [x] I managed to test the new changes locally
- [x] I confirm that the issues mentioned were fixed/resolved .

[xmnlab]

lgtm! thanks @JoshuaGlaZ !

[github-actions]

🎉 This PR is included in version 0.19.0 🎉

The release is available on:

• 0.19.0
• GitHub release

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