chore: repo cleanup — badges, URLs, metadata, keywords

[johnnichev]

Summary

General cleanup pass across README, pyproject.toml, and GitHub repo metadata. Fixes one genuinely broken item (stale example count) and aligns the project's public identity across all three sources of truth (PyPI page, GitHub landing page, README).

What was broken

Example count was wrong. The README "Examples Gallery" badge said examples-76_scripts but the actual count in examples/ is 88 .py files. Caught via find examples -maxdepth 1 -name '*.py' | wc -l. This is the most common form of documentation drift — static numbers in badges are where stale info hides.

Homepage URL was inconsistent across three places:

Source	Was	Now
pyproject.toml Homepage	https://nichevlabs.com	https://selectools.dev
GitHub repo homepageUrl	https://johnnichev.github.io/selectools	https://selectools.dev
README docs badge	linked to selectools.dev correctly	(unchanged)

Three sources of truth, three different values. Someone clicking "Homepage" on the PyPI package page ended up at the parent company site instead of the project docs. Fixed.

What changed

README.md (+8 / -6)

Badge row reorganized and upgraded:

Before:
```markdown





```

After:
```markdown







```

Per-badge rationale:

• PyPI: Switched from `badge.fury.io` (unreliable, often 503s or stale) to `shields.io/pypi/v` (reads directly from PyPI API, updates in real time)
• Downloads (new): PyPI downloads per month via pepy.tech — standard social-proof signal for a library
• CI (new): GitHub Actions workflow badge — quality signal showing the test suite passes
• Docs: Label changed from "GitHub Pages" → "selectools.dev" (the old label was technically still true but confusing post-domain migration)
• Python: Static `python-3.9+` → dynamic `pyversions` badge that auto-updates from PyPI classifiers when the supported range changes in future releases
• License: Unchanged in function, minor label/color cleanup
• Evaluators: Kept (50 is still correct)
• All cyan accents consolidated to the brand cyan `#06b6d4`

Stale count fixed:
```diff
-
+
```

`pyproject.toml` (+13 / -4)

Description tightened (268 → 207 chars):
```diff
-description = "Production-ready AI agents with tool calling, structured output, execution traces, and RAG. Provider-agnostic (OpenAI, Anthropic, Gemini, Ollama) with fallback chains, batch processing, tool policies, streaming, caching, and cost tracking."
+description = "Production-ready Python framework for AI agents with multi-agent graphs, hybrid RAG, guardrails, audit logging, 50 evaluators, and a visual builder. Supports OpenAI, Anthropic, Gemini, Ollama. By NichevLabs."
```

Keywords expanded and reformatted (16 → 23 keywords, now multi-line):

• Added: `multi-agent`, `agent-framework`, `agents`, `ollama`, `guardrails`, `evals`, `evaluators`, `visual-builder`, `langchain-alternative`
• Removed: None
• These match what users actually search for on PyPI and align with the GitHub topic list

URLs restructured:
```diff
[project.urls]
-Homepage = "https://nichevlabs.com"
+Homepage = "https://selectools.dev"
+Documentation = "https://selectools.dev"
Repository = "https://github.com/johnnichev/selectools"
Issues = "https://github.com/johnnichev/selectools/issues"
-Documentation = "https://selectools.dev"
Changelog = "https://github.com/johnnichev/selectools/blob/main/CHANGELOG.md"
+Builder = "https://selectools.dev/builder/"
+Examples = "https://selectools.dev/examples/"
+"NichevLabs" = "https://nichevlabs.com"
```

• `Homepage` is now the project site (was the parent company, which doesn't make sense as a package's home)
• `Documentation` moved up to be right under Homepage (they point to the same place for this library, which is fine)
• `Builder` and `Examples` added as direct links to the two killer features
• NichevLabs attribution moved to a clearly-labeled separate link so it's preserved but doesn't masquerade as the project homepage

GitHub repo metadata (via `gh repo edit`, applied to origin directly)

Homepage URL fixed:

• Was: `https://johnnichev.github.io/selectools\` (pre-domain migration URL, stale since PR feat: animation/delight pass + selectools.dev custom domain #40)
• Now: `https://selectools.dev\`

Topics canonicalized (19 → 18):

Removed	Reason
`multi-agents`	Plural dup of `multi-agent`
`multi-agents-orchestration`	Plural dup of `multi-agent-orchestration`
`multi-agents-system`	Plural dup, too specific
`langchain-alternatives`	Plural dup of `langchain-alternative`
`apache-2-0-license`	GitHub shows license in sidebar automatically

Added	Reason
`multi-agent-orchestration`	Canonical singular form
`tool-calling`	Was in pyproject keywords but not GitHub topics
`agent-framework`	High-traffic search term
`visual-builder`	Genuine differentiator vs other frameworks
`evals`	The eval framework is a differentiator

Final 18 topics: `ai-agents, ai-safety, anthropic, enterprise-ai, gemini, guardrails, llm, ollama, openai, python, rag, tool-calling, langchain-alternative, multi-agent, agent-framework, evals, multi-agent-orchestration, visual-builder`

All plural variants eliminated — GitHub topic search is exact-match, so plural dups fragment searches and make the repo discoverable under more terms but less consistently. The canonical singular forms (matching LangChain/CrewAI/AutoGen conventions) are the right home.

Verification

• Pre-commit hooks pass 14/14 (including `Check TOML syntax` and `Trim trailing whitespace`)
• `pyproject.toml` bracket balance check clean (42/42, 3/3)
• Description length: 268 → 207 chars
• `gh repo view` confirms new homepage and topic list applied on origin
• All cyan badge colors consolidated to `#06b6d4` brand cyan
• No broken or stale `johnnichev.github.io` references anywhere in the public surface

What's NOT in this PR

• No content changes to `docs/*.md` — audit found no stale external links (PR feat: animation/delight pass + selectools.dev custom domain #40 already cleaned those up)
• No CHANGELOG entry — this is repo hygiene, not a user-facing code change
• No version bump
• No GitHub-side actions beyond `gh repo edit` (no release retagging, no PyPI re-upload)

The next release will naturally pick up the new `pyproject.toml` metadata on PyPI without any extra steps.