TEI Loading Enhancement & Config-Based Corpus Creation

[TheoMoins]

This PR introduces two major improvements to SuperStyl:

1. Enhanced TEI Loading Functionality

• Added support for metric annotations with two new feature types:
  • met_line: Captures verse-level metric patterns
  • met_syll: Captures syllable-level metric patterns

2. Configuration-Based Corpus Loading

Addresses Issue #77:

• Implemented a new loading mechanism that accepts JSON configuration files
• This allows defining multiple feature sets in a single configuration
• Can be accessed via the load_corpus_from_config function or the --json CLI option

Example Configuration:

{
  "paths": "../corpus/02-chretiendetroyes_final.xml",
  "format": "tei",
  "sampling": {
    "enabled": true,
    "units": "verses",
    "sample_size": 1000,
    "sample_step": 500,
    "max_samples": 100,
    "sample_random": false
  },
  
  "features": [
    {
      "type": "words",
      "n": 1,
      "k": 1000,
      "freq_type": "relative",
      "culling": 0
    },
    {
      "type": "chars",
      "n": 3,
      "k": 2000,
      "freq_type": "relative",
      "culling": 5
    },
    {
      "type": "affixes",
      "n": 3,
      "k": 1000,
      "freq_type": "relative"
    },
    {
      "type": "met_line",
      "n": 1,
      "k": 500,
      "freq_type": "relative"
    },
    {
      "type": "met_syll",
      "n": 13,
      "k": 500,
      "freq_type": "relative"
    }
  ]
}

All functionality remains backward compatible with existing API calls and examples.

[codecov]

Codecov Report

Attention: Patch coverage is 77.41935% with 21 lines in your changes missing coverage. Please review.

Project coverage is 69.82%. Comparing base (8066bda) to head (d680b55).
Report is 11 commits behind head on master.

Files with missing lines	Patch %	Lines
superstyl/preproc/pipe.py	38.46%	8 Missing ⚠️
superstyl/preproc/features_extract.py	22.22%	7 Missing ⚠️
superstyl/load_from_config.py	91.30%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #88      +/-   ##
==========================================
+ Coverage   66.54%   69.82%   +3.28%     
==========================================
  Files           8        9       +1     
  Lines         550      633      +83     
==========================================
+ Hits          366      442      +76     
- Misses        184      191       +7     

Flag	Coverage Δ
unittests	69.82% <77.41%> (+3.28%)	⬆️

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