Add Python 3.10 Support and Fix Compilation Issues

[CoolJosh0221]

Description

This pull request addresses several important updates to the libact package:

1. Added Support for Python 3.10
2. Modified libact/query_strategies/_hintsvm.pyx to Ensure Successful Compilation
   • Fixed syntax errors to ensure successful compilation.
3. Updated Installation Instructions in README. md
   • Revised installation steps to include Python 3.10 setup.
4. Updated examples/plot.py to include HintSVM example
5. Resolved Dataset Error: Updated libact/base/dataset.py to fix the ValueError: setting an array element with a sequence issue during tests.

Current Status

• Compilation Issues Fixed: Successfully addressed the compilation problems in _hintsvm. pyx .
• Testing: Tests have not passed yet.
  • two of them fail, and one throws an error:

======================================================================
ERROR: test_cost_sensitive_random_pair_encoding (libact.query_strategies.multilabel.tests.test_multilabel_realdata.MultilabelRealdataTestCase)
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Traceback (most recent call last):
  File "/workspaces/libact/libact/query_strategies/multilabel/tests/test_multilabel_realdata.py", line 118, in test_cost_sensitive_random_pair_encoding
    qs = CostSensitiveReferencePairEncoding(
  File "/workspaces/libact/libact/query_strategies/multilabel/cost_sensitive_reference_pair_encoding.py", line 79, in __init__
    self.csrpe_ = CSRPE(scoring_fn=scoring_fn, base_clf=base_model,
  File "/workspaces/libact/libact/query_strategies/multilabel/cost_sensitive_reference_pair_encoding.py", line 156, in __init__
    self.nn_ = NearestNeighbors(1, algorithm='ball_tree',
TypeError: NearestNeighbors.__init__() takes 1 positional argument but 2 positional arguments (and 3 keyword-only arguments) were given

======================================================================
FAIL: test_density_weighted_meta_uncertainty_lc (libact.query_strategies.tests.test_density_weighted_meta.DensityWeightedMetaTestCase)
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Traceback (most recent call last):
  File "/workspaces/libact/libact/query_strategies/tests/test_density_weighted_meta.py", line 40, in test_density_weighted_meta_uncertainty_lc
    assert_array_equal(qseq, np.array([13, 18,  9, 12,  8, 16, 10, 19, 15, 17]))
  File "/opt/conda/envs/py310/lib/python3.10/site-packages/numpy/_utils/__init__.py", line 85, in wrapper
    return fun(*args, **kwargs)
  File "/opt/conda/envs/py310/lib/python3.10/site-packages/numpy/testing/_private/utils.py", line 1020, in assert_array_equal
    assert_array_compare(operator.__eq__, actual, desired, err_msg=err_msg,
  File "/opt/conda/envs/py310/lib/python3.10/site-packages/numpy/testing/_private/utils.py", line 884, in assert_array_compare
    raise AssertionError(msg)
AssertionError: 
Arrays are not equal

Mismatched elements: 3 / 10 (30%)
Max absolute difference among violations: 10
Max relative difference among violations: 0.58823529
 ACTUAL: array([18, 13,  9, 12,  8, 16, 10, 19, 15,  7])
 DESIRED: array([13, 18,  9, 12,  8, 16, 10, 19, 15, 17])

======================================================================
FAIL: test_DensityWeightedUncertaintySampling (libact.query_strategies.tests.test_realdata.RealdataTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/workspaces/libact/libact/query_strategies/tests/test_realdata.py", line 155, in test_DensityWeightedUncertaintySampling
    assert_array_equal(
  File "/opt/conda/envs/py310/lib/python3.10/site-packages/numpy/_utils/__init__.py", line 85, in wrapper
    return fun(*args, **kwargs)
  File "/opt/conda/envs/py310/lib/python3.10/site-packages/numpy/testing/_private/utils.py", line 1020, in assert_array_equal
    assert_array_compare(operator.__eq__, actual, desired, err_msg=err_msg,
  File "/opt/conda/envs/py310/lib/python3.10/site-packages/numpy/testing/_private/utils.py", line 884, in assert_array_compare
    raise AssertionError(msg)
AssertionError: 
Arrays are not equal

Mismatched elements: 9 / 10 (90%)
Max absolute difference among violations: 227
Max relative difference among violations: 7.56666667
 ACTUAL: array([257, 220, 179,  84, 208,  70, 245,  62,  50,  69])
 DESIRED: array([ 30, 179, 104, 186,  28,  65, 142,  62, 257, 221])

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