Link the introductory blog post from the homepage and README

[mmkal]

Adds links to the introducing sqlfu blog post from the two highest-traffic entry points, neither of which currently mentions it:

• Landing page hero — a low-key text link near the existing Start tutorial / Try in browser CTAs, pointing at /blog/introducing-sqlfu.
• packages/sqlfu/README.md — a sentence next to the existing "New to sqlfu?" Getting Started pointer, covering the why where Getting Started covers the how. (Root README regenerates via the pre-commit hook.)

Task file: tasks/link-intro-blog-post.md (first commit) — implementation follows.

🤖 Generated with Claude Code

Package size — packed 280.4 kB (+42 B, 0)

Package size

	main	this PR	Δ
packed	280.3 kB	280.4 kB	0
unpacked	1.12 MB	1.12 MB	0
files	226	226	0
https://github.com/user-attachments/assets/897ed0d7-1d4b-4e68-aaa0-bedfe83cff32

dist/vendor/*.js bundles

	main	this PR	Δ
vendor/sha256.js	4.3 kB	4.3 kB	0
vendor/sql-formatter/*.js	94.5 kB	94.5 kB	0
vendor/sqlfu-sqlite-parser/*.js	17.2 kB	17.2 kB	0
vendor/standard-schema/*.js	2.8 kB	2.8 kB	0
vendor/typesql/*.js	134.8 kB	134.8 kB	0

Measured with npm pack --dry-run --json on sqlfu (0.0.3-7 on main vs 0.0.3-7 on this PR).

How it looks

The new hero line under the CTA buttons:

https://github.com/user-attachments/assets/8c0d1108-178f-4421-8e82-e8cd5f7b0032

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/sqlfu@141

commit: bbc7bf2