Docs update

[susuhahnml]

This PR updates the documentation setup to publish under a /docs subpath, restructures MkDocs navigation using literate-nav + SUMMARY.md, and refreshes various docs pages/assets and supporting project metadata.

Changes:

• Update MkDocs configuration (site URL/output dir, social links, syntax highlighting) and switch navigation to literate-nav driven by docs/SUMMARY.md.
• Add/replace documentation pages (new “Use” pages, new CLI reference page) and remove older pages that are no longer part of the nav.
• Update doc build/deploy plumbing (doc dependencies, GitHub Pages workflow) and refresh Potassco icon assets/CSS.

[rkaminsk]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved all merge conflicts in commit 4081664:

• .github/workflows/doc.yml: Used updated action versions (v6) from master, kept Python 3.12
• .github/workflows/test.yml: Included all Python versions (3.10, 3.11, 3.12, 3.14)
• docs/_custom/css/extra.css: Used the updated color scheme from master (#4378dc/#253758), kept the admonitions section from this PR
• pyproject.toml: Accepted master's tooling updates (ruff, ty, pytest), kept the detailed doc dependencies added by this PR

[rkaminsk]

I rebased this on the latest master where I also updated the tools. Please have a look whether this is okay with you. Otherwise, we can merge this if potassco.org/project/docs is going to be the final url for the projects.

[Copilot]

Pull request overview

This PR updates the documentation setup to publish under a /docs subpath, restructures MkDocs navigation using literate-nav + SUMMARY.md, and refreshes various docs pages/assets and supporting project metadata.

Changes:

• Update MkDocs configuration (site URL/output dir, social links, syntax highlighting) and switch navigation to literate-nav driven by docs/SUMMARY.md.
• Add/replace documentation pages (new “Use” pages, new CLI reference page) and remove older pages that are no longer part of the nav.
• Update doc build/deploy plumbing (doc dependencies, GitHub Pages workflow) and refresh Potassco icon assets/CSS.

Reviewed changes

Copilot reviewed 22 out of 31 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pyproject.toml	Updates doc/dev optional dependencies for MkDocs + plugins.
mkdocs.yml	Switches to /docs URL/output dir, adds literate-nav, updates markdown extensions/social icons/favicon.
docs/use/quick-start.md	Adds a new Quick Start page that includes README content via snippets.
docs/use/installation.md	Adds a new Installation page with pip/CLI verification steps.
docs/use/help.md	Adds a new Help/FAQ page (contains issue-tracker links needing correction).
docs/SUMMARY.md	Defines the MkDocs navigation via literate-nav.
docs/reference/problem/index.md	Removes the old “Problem specification” reference stub.
docs/reference/index.md	Simplifies the reference landing page and adjusts formatting.
docs/reference/cli/index.md	Adds a new CLI reference page (contains a typo needing correction).
docs/getting_started.md	Removes the old getting started page.
docs/examples/index.md	Removes emoji from the examples landing page intro.
docs/community/index.md	Removes the old community landing page.
docs/community/help.md	Removes the old community help page (replaced by docs/use/help.md).
docs/assets/images/potassco-logo.svg	Replaces the logo SVG content.
docs/assets/images/potassco-logo-dark.svg	Removes the dark logo asset.
docs/assets/images/potassco-full-logo.svg	Removes the full logo asset.
docs/_custom/overrides/.icons/potassco-logo.svg	Updates the theme icon SVG to use currentColor.
docs/_custom/overrides/.icons/potassco-full-logo.svg	Removes the full logo override icon.
docs/_custom/css/extra.css	Adds styling for header and admonitions; removes commented-out CSS.
DEVELOPMENT.md	Adds/adjusts development install instructions (install command should use [dev]).
DEPLOYMENT.md	Updates wording and documents the final docs URL under /docs.
CONTRIBUTING.md	Removes emojis and tweaks phrasing/punctuation.
.github/workflows/doc.yml	Updates doc build to Python 3.12 and adjusts deployed URL to include /docs/.

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[susuhahnml]

Shall we merge then? @rkaminsk

[rkaminsk]

@copilot can you review this? Since this is about documentation, can you check if there are any typos or grammar errors and provide a PR with fixes if necessary?