Merge latest from master into staging

[eshaben]

📝 Description

This PR pulls in the latest changes from the docs site into staging, these changes include:

• update script #1151
• patch script to remove last modified lines from site-index.json #1141
• Fix - Add chain spec path argument #1136 (merged this in, but didn't keep the changes cause this file is being removed in a separate PR. If we need this page in the future, we can go back in master history to grab it)
• Patch per-page LLM widget #1133
• Reorder APIs on the sidebar #1122 (merged this in, but didn't keep the changes since it's not relevant to the new IA)
• Add Wallet Tools section with LunoKit integration library #1121 (merged this in, but didn't keep the changes cause this file is being removed in a separate PR. If we need this page in the future, we can go back in master history to grab it)
• Dark mode images fix #1110
• Dawn/per page llm staging #1101

⚠️ Note to reviewer: Some of the AI files in the old directories were deleted and some were kept because not everything has been deleted from those files, only the files that were initially migrated. There's a separate PR that deletes all of these old directories, so when those PRs go in, the rest of the corresponding AI files will be deleted at that time.

[Copilot]

Pull Request Overview

This PR merges recent changes from the master branch into staging, consolidating updates from multiple pull requests. The changes primarily involve removing deprecated documentation pages, adding new structural pages for the revised information architecture, and minor content updates to existing pages.

Key Changes

• Removal of multiple deprecated documentation pages across protocol basics, architecture, infrastructure, and reference sections
• Addition of new category landing pages for the revised documentation structure
• Minor content and formatting updates to support pages and developer guides

Reviewed Changes

Copilot reviewed 113 out of 188 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
.ai/pages/polkadot-protocol-parachain-basics-chain-data.md	Removed deprecated chain data documentation page
.ai/pages/polkadot-protocol-parachain-basics-blocks-transactions-fees.md	Added new landing page for blocks, transactions, and fees section
.ai/pages/polkadot-protocol-parachain-basics-blocks-transactions-fees-transactions.md	Removed deprecated transactions documentation page
.ai/pages/polkadot-protocol-parachain-basics-blocks-transactions-fees-fees.md	Removed deprecated fees documentation page
.ai/pages/polkadot-protocol-parachain-basics-blocks-transactions-fees-blocks.md	Removed deprecated blocks documentation page
.ai/pages/polkadot-protocol-parachain-basics-accounts.md	Removed deprecated accounts documentation page
.ai/pages/polkadot-protocol-onchain-governance.md	Added new landing page for on-chain governance section
.ai/pages/polkadot-protocol-onchain-governance-origins-tracks.md	Removed deprecated origins and tracks documentation page
.ai/pages/polkadot-protocol-glossary.md	Removed deprecated glossary page
.ai/pages/polkadot-protocol-architecture.md	Added new landing page for architecture section
.ai/pages/polkadot-protocol-architecture-system-chains.md	Added new landing page for system chains section
Multiple system chain pages	Removed deprecated system chain documentation pages (People, Collectives, Bridge Hub, Asset Hub)
.ai/pages/polkadot-protocol-architecture-polkadot-chain.md	Added new landing page for Polkadot chain section
Multiple Polkadot chain pages	Removed deprecated Polkadot chain documentation pages (PoS consensus, overview, elastic scaling, agile coretime)
.ai/pages/polkadot-protocol-architecture-parachains.md	Added new landing page for parachains section
Multiple infrastructure pages	Removed extensive validator and node operation documentation
.ai/pages/parachains-customize-runtime.md	Added new FRAME overview and runtime customization guide
.ai/pages/nodes-and-validators-run-a-validator-onboarding-and-offboarding-start-validating.md	Minor formatting and content improvements to validator setup instructions
.ai/pages/get-support-ai-ready-docs.md	Formatting improvements to table structure for AI-ready documentation downloads
Multiple new landing pages	Added index, support, and develop section landing pages

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