feat: add RhaiAnalyzerExt trait for enhanced script analysis

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Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	rhai@​1.25.0

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Pull request overview

Adds a public RhaiAnalyzerExt extension trait so callers can invoke analysis helpers directly on rhai::AST, while updating docs and dependency metadata for the crates.io Rhai release.

Changes:

• Introduces RhaiAnalyzerExt with analyze, accessed_variables, and string_comparisons_for.
• Adds unit tests for the new trait methods.
• Updates Rhai dependency from git to 1.25.0 and refreshes README examples.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
src/lib.rs	Adds the extension trait implementation and related tests.
README.md	Documents the extension trait usage and updated dependency versions.
Cargo.toml	Switches Rhai dependency to crates.io version 1.25.0.
Cargo.lock	Updates locked Rhai packages to registry sources.

Comments suppressed due to low confidence (1)

README.md:105

• The result data structure example is now syntactically incomplete: it shows fields followed by a closing brace but omits the pub struct ScriptAnalysisResult { opening line, which makes the documentation harder to copy or understand. Please restore the struct declaration (and any needed context/imports) or mark this as a field excerpt without the unmatched brace.

```rust,ignore
    /// All unique, fully-qualified variable paths accessed in the script.
    pub accessed_variables: HashSet<String>,

    /// Local variables defined within the script via `let` or loops.
    pub local_variables: HashSet<String>,

    /// Maps a variable path to the set of string literals it is compared against.
    pub string_comparisons: HashMap<String, HashSet<String>>,
}

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