[Small] Document rationale for doc = false in binary definition

[coderabbitai]

Problem

The workspace root binary definition includes doc = false as a workaround, but the rationale is not documented, which may cause future confusion.

Requested Action

Add a brief comment in Cargo.toml near the [[bin]] section explaining why doc = false is necessary (e.g., to avoid doc-tooling friction with the duplicate binary definition).

References

• Cargo.toml:52-56

Context

Raised during review of PR #93: #93

Priority

Small

[traycerai]

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[leynos]

The request conflicts with the current checkout: Cargo.toml no longer contains the root [[bin]] entry or doc = false. That workaround existed in commit f6456d8 from PR #93, but it was removed later by f7ac1e4 when binary ownership moved back into installer/.I couldn’t apply the requested comment in the current workspace because the target stanza is gone.

Cargo.toml at the repo root no longer has the duplicate [[bin]] entry or doc = false; that workaround existed in commit f6456d8 from PR #93:

• [[bin]]
• name = "whitaker-installer"
• path = "installer/src/main.rs"
• doc = false

It was removed later by commit f7ac1e4 (Consolidate installer binary ownership to installer crate (#105)), and the current checkout now defines installer binaries only in installer/Cargo.toml.