feat(cli): consolidate --help and --version output across all binaries

[rodonile]

This PR depends on #39.

Summary

Adds consistent, detailed --version / -V output across the CLI binaries
(pcap-decoder, collector, yang-consumer), showing commit hash/date,
branch/tag, build time, Rust toolchain, and OS.

Changes

• pcap-decoder: added build.rs + shadow-rs build-dependency (mirrors
  collector/yang-consumer setup) and a custom version_info() used for
  --version.
• collector: replaced the manual -v/--version boolean flag and
  early-exit branch with clap's built-in ArgAction::Version (-V), which
  lets --version run without requiring config_file to be provided.
• yang-consumer: switched from clap's default #[command(version)] to
  the same custom multi-line version_info() used elsewhere.

[Copilot]

Pull request overview

This PR standardizes --version / -V output across the workspace’s CLI binaries by switching to a shared multi-line build-info version string (commit, branch/tag, build time, toolchain, OS) and aligning clap configuration so --version can exit early without requiring other arguments.

Changes:

• Added a shared-style version_info() multi-line string to collector, pcap-decoder, and yang-consumer, and wired it into clap’s version handling.
• Updated collector to use clap’s ArgAction::Version (-V) instead of a manual -v/--version early-exit branch, and made config_file required again.
• Added shadow-rs build integration for pcap-decoder (new build.rs, Cargo.toml updates, lockfile update).

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
crates/yang-consumer/src/main.rs	Adds custom multi-line version info and a -V/--version flag using clap’s version action.
crates/pcap-decoder/src/main.rs	Adds shadow-rs build metadata and uses the shared multi-line version output via clap.
crates/pcap-decoder/Cargo.toml	Enables a build script and adds shadow-rs dependency/build-dependency.
crates/pcap-decoder/build.rs	Generates shadow-rs build metadata during compilation.
crates/collector/src/main.rs	Replaces manual version printing with clap’s version action and shared version string.
Cargo.lock	Records the new shadow-rs dependency for pcap-decoder.

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 2 comments.