1234: grammar and formatting improvements; connectivity

[Nadia-JSch]

Summary of changes

index.mdx

• Updated page title from "Patch Panels" to "Connectivity"
• Replaced broken manual TOC and placeholder text with a one-sentence descriptive intro

cables.mdx

• Corrected nav path to Infrastructure > Connectivity > Cables (was Hardware > Cables)
• Corrected rack layout nav path to match current UI
• Converted absolute internal link to docs-root-relative .mdx format

circuits.mdx

• Rewrote intro to combine two redundant sentences
• Minor sentence clarity improvements

creating-wall-jacks.mdx

• Updated page title to imperative mood: "Create Wall Jacks"
• Simplified and clarified multi-step instructions throughout

patch-panels/index.mdx

• Replaced broken manual TOC with a one-sentence descriptive intro
• Removed stale author/date metadata

patch-panels/creating-patch-panels-from-scratch-in-device42-an-example.mdx

• Updated page title to title case: "Create Patch Panels From Scratch: An Example"
• Removed first-person plural ("we", "our") throughout
• Converted absolute internal link to docs-root-relative .mdx format
• Minor sentence clarity improvements

patch-panels/patch-panel-cable-management-definitions-and-legends-2.mdx

• Condensed several wordy paragraphs
• Reduced passive voice in several places

Preview links

• Cables
• Circuits
• Creating Wall Jacks
• Connectivity
• Creating Patch Panels From Scratch
• Patch Panels
• Patch Panel Cable Management