docs: add OpenCoven brand system

[BunsDev]

No description provided.

[Copilot]

Pull request overview

Adds a new OpenCoven brand system to the repository: a root design spec, canonical logo/icon/social assets, shared UI token files, and landing-page updates so the public web/ surface reflects the new brand language.

Changes:

• Adds the canonical brand/design documentation and contributor guidance under DESIGN.md, docs/, and brand/docs/.
• Introduces reusable brand assets and tokens under brand/ plus mirrored landing-page assets under web/.
• Updates the landing page metadata, copy, and styling to use the new OpenCoven brand system.

Reviewed changes

Copilot reviewed 13 out of 32 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
web/og.svg	Adds web-facing SVG social preview artwork.
web/index.html	Updates landing metadata, copy, and styling hooks for the new brand system.
web/favicon.svg	Adds SVG favicon using the new mark.
web/brand.css	Adds landing-page brand override stylesheet.
web/assets/typography.css	Adds landing-local typography tokens.
web/assets/color-tokens.css	Adds landing-local color tokens.
README.md	Links root README to the new design/branding docs.
docs/README.md	Expands docs index with brand-system references.
docs/BRANDING-ADHERENCE.md	Adds rollout checklist, exceptions, and risks for branding adoption.
docs/BRAND.md	Reworks brand doc around the new canonical system and asset pack.
DESIGN.md	Adds the root OpenCoven brand and design system specification.
brand/ui/typography.css	Adds canonical typography tokens.
brand/ui/color-tokens.css	Adds canonical color tokens.
brand/social/opencoven-og.svg	Adds canonical SVG OG/social artwork.
brand/logo/opencoven-white.svg	Adds white logo variant.
brand/logo/opencoven-monoline.svg	Adds monoline logo variant for technical/docs use.
brand/logo/opencoven-mark.svg	Adds gradient mark-only logo asset.
brand/logo/opencoven-logo.svg	Adds primary gradient logo asset.
brand/logo/opencoven-black.svg	Adds black logo variant for light backgrounds.
brand/icons/workflow.svg	Adds workflow icon asset.
brand/icons/trident.svg	Adds trident icon asset.
brand/icons/tool-execute.svg	Adds tool-execution icon asset.
brand/icons/gateway.svg	Adds gateway icon asset.
brand/icons/agent-node.svg	Adds agent-node icon asset.
brand/docs/DESIGN.md	Adds a brand-doc pointer file intended to reference the root design spec.
brand/docs/BRAND-USAGE.md	Adds contributor-facing brand usage guidance.

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[BunsDev]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Merge conflicts resolved in commit c4d7a26. The following conflicts were resolved:

• brand/logo/*.svg (add/add): Accepted the updated versions from main (a4857f8 Update opencoven-black.svg)
• brand/social/opencoven-og.{svg,png} and web/og.{svg,png} (add/add): Accepted main versions
• docs/README.md (content): Merged in the OpenClaw rescue loop section from main

Also fixed the issues flagged in the code review (commit aca04a1):

• Fixed broken link in brand/docs/DESIGN.md (../DESIGN.md → ../../DESIGN.md)
• Removed duplicate embedded content from brand/docs/DESIGN.md — it is now a pure pointer
• Fixed sync guidance in docs/BRAND.md to reference opencoven.svg instead of opencoven-128.png
• Corrected typography line-height tokens in both brand/ui/typography.css and web/assets/typography.css to match the DESIGN.md spec (1.4 body / 1.2 headers)