docs: add v3 cli commands to rpc-go

[graikhel-intel]

PR Checklist

• Leverages formatting as provided by https://squidfunk.github.io/mkdocs-material/reference/abbreviations/
• Have viewed and verified edits in rendered form ensuring proper formatting

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Pull request overview

Adds MkDocs navigation and new documentation pages to cover RPC-Go v3 (Beta) CLI commands, plus expands troubleshooting guidance with RPC error codes.

Changes:

• Adds a v3 “Commands” section to the MkDocs nav (overview + server/local/info command pages).
• Introduces new v3 CLI reference docs for server mode, local mode, and info/diagnostics commands.
• Updates RPC overview/about pages and adds an “RPC Error Codes” section to troubleshooting.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
mkdocs.yml	Adds v3 “Commands” pages to the site navigation.
docs/Reference/troubleshooting.md	Adds a new “RPC Error Codes” reference section.
docs/Reference/RPC/v3/commands.md	Adds a v3 commands landing/overview page with cross-links to detailed references.
docs/Reference/RPC/v3/commandsServer.md	Adds server-mode CLI reference for activate/deactivate.
docs/Reference/RPC/v3/commandsLocal.md	Adds extensive local-mode CLI reference (activate/deactivate/configure and subcommands).
docs/Reference/RPC/v3/commandsInfo.md	Adds info/diagnostics/version CLI reference and amtinfo --sync notes.
docs/Reference/RPC/v3/about-v3.md	Cleans up/updates v3 overview wording and formatting.
docs/Reference/RPC/overview.md	Updates RPC deployment model descriptions and links to v3 CLI pages.

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