feat(classification): add semantic classifier for URL and domain detection

[unclesp1d3r]

• Introduced a new SemanticClassifier module for identifying and tagging network indicators such as URLs and domain names within extracted strings.
• Implemented pattern matching using compiled regular expressions for efficient detection, including TLD validation to minimize false positives.
• Updated the Cargo.toml to include new dependencies: lazy_static and regex.
• Enhanced the mod.rs file to expose the new SemanticClassifier functionality.

This addition significantly improves the library's ability to analyze strings for network-related content, enhancing its utility in binary analysis.

[coderabbitai]

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Summary by CodeRabbit

• New Features
  • Added semantic classification to detect URLs and domain names in text, with TLD validation and a public classifier API.
• Tests
  • Added unit tests covering URL/domain detection, edge cases, and TLD validation.
• Chores
  • Added runtime dependencies for regex support.
• Documentation
  • Updated documentation build workflow and refined a doc comment for clarity.

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Walkthrough

Adds a new semantic classification module that detects URLs and domain names (with TLD validation) and exposes it via the classification module; adds regex and lazy_static dependencies; updates mdBook version and removes a docs plugin; minor doc-style change in a PE extraction file.

Changes

Cohort / File(s)	Summary
Dependency Management Cargo.toml	Added lazy_static = "1.5" and regex = "1.12.2" to [dependencies].
Module Exposure src/classification/mod.rs	Added pub mod semantic; and pub use semantic::SemanticClassifier; to expose the new classifier.
Semantic Classification Implementation src/classification/semantic.rs	New SemanticClassifier providing new(), classify_url(), classify_domain(), and classify(); uses precompiled regexes and an internal TLD validator; includes unit tests covering URLs, domains, TLDs, and edge cases.
Docs Workflow .github/workflows/docs.yml	Bumped mdBook from 0.4.52 to 0.5.2 and removed the mdbook-alerts plugin from install steps.
PE Extraction Docs src/extraction/pe_resources.rs	Minor doc-comment style change: converted return-type description to inline code style in the doc comment (no behavioral change).

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related issues

• Implement URL and Domain Pattern Matching in Semantic Classification System #15 — Implements the same SemanticClassifier with regex + lazy_static, TLD validation, and tests, matching this PR's feature.

Poem

🐰 I hop through bytes both close and far,
I sniff for domains and every URL star,
TLDs checked with careful regex art,
I tag each string and play my part,
Hooray — semantic hunting from the start! 🎉

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically summarizes the main change: adding a semantic classifier for URL and domain detection, which aligns with the primary objective of the PR.
Description check	✅ Passed	The description is directly related to the changeset, covering the new SemanticClassifier module, regex-based pattern matching, dependency updates, and module exposure.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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📥 Commits

Reviewing files that changed from the base of the PR and between e971b47 and ccfb91f.

📒 Files selected for processing (5)

• .github/workflows/docs.yml
• Cargo.toml
• src/classification/mod.rs
• src/classification/semantic.rs
• src/extraction/pe_resources.rs

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