Add llms.txt to docs

[necolas]

Add an initial LLM context to help bootstrap LLM-based development. We've had success with this approach internally

[github-actions]

workflow: benchmarks/size

Comparison of minified (terser) and compressed (brotli) size results, measured in bytes. Smaller is better.

Results	Base	Patch	Ratio
react-strict-dom/dist/web/index.js
· compressed	3,251	3,251	1.00
· minified	10,375	10,375	1.00
react-strict-dom/dist/web/runtime.js
· compressed	1,645	1,645	1.00
· minified	4,131	4,131	1.00
react-strict-dom/dist/native/index.js
· compressed	16,232	16,232	1.00
· minified	62,962	62,962	1.00

[github-actions]

workflow: benchmarks/perf (native)

Comparison of performance test results, measured in operations per second. Larger is better.

Results	Base	Patch	Ratio
css.create
· small	1,198,308	1,203,777	1.00	+
· small with units	542,176	527,408	0.97	-
· small with variables	714,476	686,380	0.96	-
· several small	386,382	377,739	0.98	-
· large	220,861	214,491	0.97	-
· large with polyfills	163,630	160,882	0.98	-
· complex	114,489	112,988	0.99	-
· unsupported	229,235	227,110	0.99	-
css.createTheme
· simple theme	227,445	227,877	1.00	+
· polyfill theme	217,604	219,144	1.01	+
css.props
· small	264,573	262,742	0.99	-
· small with units	215,942	215,827	1.00	-
· small with variables	128,669	128,547	1.00	-
· small with variables of units	91,918	93,263	1.01	+
· large	116,145	115,490	0.99	-
· large with polyfills	47,064	46,955	1.00	-
· complex	26,365	26,013	0.99	-
· unsupported	163,746	163,501	1.00	-
· simple merge	178,794	178,907	1.00	+
· wide merge	19,625	19,404	0.99	-
· deep merge	19,168	19,098	1.00	-
· themed merge	37,518	37,511	1.00	-