Add per-page icons to docs sidebar

[atlas-agent-omi]

Adds icons to each individual page in the docs sidebar (not group headings). Each MDX file gets an icon frontmatter property.

61 pages updated with contextual icons — similar to the Supermemory docs style where every line item has its own icon.

Examples:

• 🧠 Memories → brain
• 🔑 API Keys → key
• 📡 Transcription → microphone
• 🔌 MCP → plug
• 🛒 Buying Guide → cart-shopping
• 🔒 Privacy → lock

[greptile-apps]

Greptile Summary

This PR adds per-page icon frontmatter to 61 MDX documentation files, giving every sidebar item its own contextual icon (e.g. brain for Memories, key for API Keys, microphone for Transcription). As part of the change, all group-level "icon" entries are removed from docs.json, shifting icon decoration entirely to individual pages.

Key changes:

• 61 MDX files receive a new icon frontmatter field with contextually appropriate Font Awesome icon names
• All "icon" properties on navigation groups in docs.json are removed (groups will now render without icons in the sidebar)
• One formatting issue introduced: "doc/developer/apps/OpenSource" in docs.json has incorrect excessive indentation (~20 spaces instead of the consistent 10)
• docs.json loses its trailing newline

Confidence Score: 4/5

• Safe to merge after fixing the indentation typo and trailing newline in docs.json; the group icon removal is a deliberate design choice worth confirming.
• The MDX changes are all trivially correct — adding a single icon frontmatter line to each file. The only concrete issues are in docs.json: one entry with wrong indentation (harmless to JSON parsing but inconsistent) and a missing trailing newline. The removal of group-level icons is intentional per the PR description, so it's not a bug. No logic or functional regressions are introduced.
• docs/docs.json — indentation typo on line 101 and missing trailing newline should be fixed before merge.

Important Files Changed

Filename	Overview
docs/docs.json	All navigation group-level icons removed; one page entry has incorrect indentation; missing trailing newline introduced.
docs/doc/developer/apps/OpenSource.mdx	Adds icon: "code-branch" to frontmatter — appropriate icon, no issues.
docs/getstartedwithomi.mdx	Adds icon: "play" to frontmatter — contextually appropriate.
docs/doc/get_started/introduction.mdx	Adds icon: "book-open" to frontmatter — appropriate.
docs/doc/developer/MCP.mdx	Adds icon: "plug" to frontmatter — reuses the former group-level icon, appropriate.
docs/doc/developer/api/memories.mdx	Adds icon: "brain" — semantically relevant to memories.
docs/doc/info/Privacy.mdx	Adds icon: "lock" — appropriate for a privacy policy page.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[docs.json navigation groups] -->|Previously| B[Group-level icon on each group heading]
    A -->|After this PR| C[No icon on group headings]
    D[MDX page frontmatter] -->|Previously| E[title + description only]
    D -->|After this PR| F[title + description + icon per page]
    F --> G[Sidebar shows icon next to every page item]
    C --> H[Sidebar shows plain text group headers]

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_{Reviews (1): Last reviewed commit: "Add icons to individual docs sidebar pag..." | Re-trigger Greptile}

[greptile-apps]

Incorrect indentation on OpenSource entry

The "doc/developer/apps/OpenSource" entry at line 101 has about 20 leading spaces instead of the 10 used by every other page entry at the same nesting level (e.g. "doc/developer/apps/Submitting" on the line above). While JSON parsers ignore whitespace outside strings so this won't break parsing, it's inconsistent and suggests an accidental edit.

Suggested change

	"doc/developer/apps/OpenSource"
	"doc/developer/apps/OpenSource"

[greptile-apps]

Missing newline at end of file

The diff shows the closing } was changed to remove the trailing newline (-}\n → +}), leaving the file without a POSIX-compliant end-of-file newline. Most editors and linters (including Mintlify's tooling) expect a trailing newline. Add one back to restore the original behaviour.

Suggested change

	}
	}

[greptile-apps]

Group-level icons removed from all navigation groups

Every top-level and nested group entry (e.g. "Get Started", "Core Development", "Backend", "Firmware", "SDK", "Audio & Testing", "Developer API", "MCP Integration", "Build Apps", "Examples", "Hardware", "Open Source Hardware", "OmiGlass", "DIY Guide", "Info") had their "icon" field removed. This means sidebar group headers will now render without icons on the Mintlify site.

Per the PR description this is intentional (moving icons from groups to individual pages), but it's worth verifying the visual result is acceptable — Mintlify displays group headings prominently and many users rely on group icons to orient themselves in the sidebar. If the intent is to have both group and page icons, the group "icon" entries would need to be kept.