Implement rcedit-compatible CLI

[pl4nty]

Change description
Implements a basic CLI and cargo feature to replace the recently-deprecated rcedit. Tested manually with rcedit's examples.

Details

Additional context
I used clap because I'm familiar with it, but I don't really have a strong preference for arg parser.

get_resource_string and set_resource_string might belong in resource.rs instead with corresponding tests, let me know if that's preferred.

The GitHub Action was just to quickly build exes for testing, since I develop on Linux. Happy to remove or replace with your preferred build/release approach for artefacts.

[Copilot]

Pull request overview

Adds an rcedit-compatible command-line interface to the editpe crate so developers can edit PE resources (version info, icons, manifests, string tables, RCDATA) via a binary, with an optional Cargo feature and CI builds for multiple targets.

Changes:

• Introduces a new editpe CLI binary (Clap-based) with rcedit-like flags for reading/writing PE resources.
• Adds a cli Cargo feature and gates the binary behind it (and enables it by default).
• Extends the publish workflow with a build matrix that uploads platform artifacts.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 8 comments.

File	Description
src/main.rs	New Clap-based CLI implementation plus helper functions for version parsing, manifest mutation, and string-table get/set.
Cargo.toml	Adds [[bin]] entry, introduces cli feature (with clap dep), and enables cli by default.
.github/workflows/publish.yml	Adds a matrix build job producing release binaries for multiple targets and uploading artifacts.

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