Refocus main README on user experience and getting started

[Copilot]

The main README mixed user-facing getting-started content with design philosophy and verbose internal explanations, making it harder to quickly onboard.

Changes

• Removed Philosophy section — design rationale belongs in per-tool READMEs
• Promoted Installation to the top — immediately after the one-line intro, before any tool descriptions; includes both tools and agent skills install commands together
• Moved Requirements above Tools — prerequisites visible before users attempt installation
• Added install/README.md — dedicated reference for all install options (custom pip command, branch/tag, agent targets, dry-run, env vars) for both the tools and skills install scripts
• Simplified Installation section — replaced verbose inline options list with a single link to install/README.md
• Removed standalone Agent Skills section — skills install is now part of the Installation section; full options covered in install/README.md
• Removed multi-tool Example Workflow — a tutorial combining Metrix + Nexus + Accordo doesn't belong at the top-level README; per-tool docs are the right home

Per-tool quick examples, documentation links, contributing, and license sections unchanged.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Make README focused on user experience and primary usage modes</issue_title>
<issue_description>The main readme needs to be focused on how a user can get started, install the tools and use them. Explaining the ideas and the design decisions is important but should not be too verbose and should be left for per-tools readme. Reorganize and cleanup the readme. </issue_description>

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

• Fixes Make README focused on user experience and primary usage modes #63

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[mawad-amd]

@copilot you need to add the skills too. Also, options are great but we can refer to a asperate readme with all options...

[Copilot]

Done in a0714f1:

• Skills install command is now in the Installation section alongside the tools install command
• Created install/README.md with full options for both the tools and skills install scripts (tables, examples, env vars)
• Replaced the inline options list in the main README with a single line linking to install/README.md
• Removed the separate "Agent Skills" section since it's now covered in Installation + the dedicated README