refactor!: simplify Segments API

[gvozdvmozgu]

No description provided.

[github-actions]

Benchmark for f667485

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Test	Base	PR	%
DepthMap::from_parent	50.4±0.62µs	55.3±0.40µs	+9.72%
fix_complex_query	11.8±0.16ms	12.8±0.06ms	+8.47%
fix_superlong	157.9±20.28ms	160.6±16.02ms	+1.71%
parse_complex_query	4.2±0.06µs	4.9±0.08µs	+16.67%
parse_expression_recursion	7.3±0.10µs	8.2±0.08µs	+12.33%
parse_simple_query	1108.1±18.35ns	1368.1±25.52ns	+23.46%

[github-actions]

Benchmark for a959ca2

Click to view benchmark

Test	Base	PR	%
DepthMap::from_parent	50.3±1.07µs	50.0±0.29µs	-0.60%
fix_complex_query	11.6±0.05ms	11.7±0.06ms	+0.86%
fix_superlong	129.3±13.37ms	132.8±14.70ms	+2.71%
parse_complex_query	4.2±0.06µs	4.3±0.07µs	+2.38%
parse_expression_recursion	7.3±0.09µs	7.3±0.10µs	0.00%
parse_simple_query	1077.9±20.39ns	1065.2±11.33ns	-1.18%