Fix incorrect btar repository link in codebase-readiness skill

[Copilot]

The codebase-readiness skill referenced the wrong GitHub repository for btar.

Changes

• Updated btar link from https://github.com/btahq/btar → https://github.com/jaredmcfarland/btar in plugins/codebase-readiness/skills/codebase-readiness/SKILL.md
• Bumped codebase-readiness plugin version from 1.4.0 → 1.4.1 in plugin.json and marketplace.json

Original prompt

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This section details on the original issue you should resolve

<issue_title>Incorrect btar link</issue_title>
<issue_description>The link to btar in the code-readiness skill is incorrect. Should be https://github.com/jaredmcfarland/btar</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Incorrect btar link #22

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[dgalarza]

@copilot let's make this a patch update for the skill as well.

[Copilot]

@copilot let's make this a patch update for the skill as well.

Done — bumped the version to 1.4.1 in both plugin.json and marketplace.json (adda03f).