docs: make the getting started guide work without a model provider API key (#2283)

Improve documentation formatting for clarity and consistency (#1389) * Refine documentation across various sections for clarity and consistency - Updated descriptions in datasets, models, runtime, and views documentation to enhance readability and precision. - Improved explanations regarding retry mechanisms and refresh attempts in acceleration settings. - Clarified the purpose and functionality of the `WITH` clause in SQL documentation. - Enhanced troubleshooting guidance with detailed common issues and solutions for dataset loading, query performance, and AI chat results. - Revised use case descriptions for agentic apps, edge AI, federated MCP server, object-store AI engine, and more to improve clarity and impact. - Streamlined language throughout the documentation to ensure consistency and better user understanding. * Improve documentation formatting for clarity and consistency across multiple sections * Apply suggestion from @lukekim * Update documentation links for consistency and clarity across multiple sections

Improve documentation formatting for clarity and consistency (#1389) * Refine documentation across various sections for clarity and consistency - Updated descriptions in datasets, models, runtime, and views documentation to enhance readability and precision. - Improved explanations regarding retry mechanisms and refresh attempts in acceleration settings. - Clarified the purpose and functionality of the `WITH` clause in SQL documentation. - Enhanced troubleshooting guidance with detailed common issues and solutions for dataset loading, query performance, and AI chat results. - Revised use case descriptions for agentic apps, edge AI, federated MCP server, object-store AI engine, and more to improve clarity and impact. - Streamlined language throughout the documentation to ensure consistency and better user understanding. * Improve documentation formatting for clarity and consistency across multiple sections * Apply suggestion from @lukekim * Update documentation links for consistency and clarity across multiple sections

docs(telemetry): the Data Collected list omitted the host hardware attributes crates/telemetry/src/anonymous.rs::resource builds the telemetry resource with five attributes beyond service.name/name: service.version, service.instance.id, spicepod.id, host.cpu.count, host.gpu.count and host.memory.bytes. The page — whose purpose is to enumerate what leaves the host — listed only the first three. The hardware attributes arrived in spiceai/spiceai#8483, first released v1.11.0, so they are added to v1.11.x and later. The instance-id formula also lost a separator: since spiceai/spiceai#9321 (first released v2.0.0) the hash is SHA256(hostname + ":" + spicepod_name), not the concatenation the page describes. Corrected for v2.0.x and later; v1.11.x and older document their own releases correctly. Both source links pointed at blob/trunk with a line anchor, so every snapshot linked today's code at a line that has since moved — L65 of anonymous.rs is now a blank line inside resource(), and L32 of lib.rs is a histogram-bucket comment rather than the metric definitions. Each doc set now links its own release tag (vNext links the reviewed trunk SHA), the identifier link spans the whole resource() function at that ref, and the metrics link drops the stale line anchor.