fix(tag): add multi-module workspace support

[indaco]

Description

Fixes a bug where sley tag create, sley tag push, and sley tag list commands fail in multi-module projects with the error open .version: no such file or directory.

Changes Made

• Added multi-module flags (--all, --module, --modules, --pattern) to the tag command via cliflags.MultiModuleFlags()
• Implemented resolveVersionPath() function that uses clix.GetExecutionContext to properly detect and handle multi-module workspaces
• Updated runCreateCmd and runPushCmd to call resolveVersionPath() instead of getVersionPath()
• Added interactive TUI module selection - in multi-module mode without --all/--module flags, users are prompted to select which module's version to tag

Behavior

Single-module projects: Works exactly as before (backward compatible)

Multi-module projects:

• Interactive mode: Shows TUI prompt to select which module's version to use
• --all flag: Auto-selects first module (no prompt)
• --module <name> flag: Uses specified module's version
• Prints which module the version was sourced from for transparency

Related Issue

Fixes #208

Notes for Reviewers

• None