Add more details to env setup docs (Expo)

[necolas]

No description provided.

[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/dom/index.js
· compressed	2,515	2,515	1.00
· minified	8,688	8,688	1.00
react-strict-dom/dist/dom/runtime.js
· compressed	855	855	1.00
· minified	2,435	2,435	1.00
react-strict-dom/dist/native/index.js
· compressed	15,834	15,834	1.00
· minified	59,133	59,133	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	1,147,874	1,157,779	1.01	+
· small with units	445,230	446,955	1.00	+
· small with variables	677,214	673,940	1.00	-
· several small	326,870	327,616	1.00	+
· large	212,462	213,975	1.01	+
· large with polyfills	146,548	148,736	1.01	+
· complex	101,693	101,821	1.00	+
· unsupported	225,249	224,577	1.00	-
css.createTheme
· simple theme	222,448	214,745	0.97	-
· polyfill theme	213,153	203,056	0.95	-
css.props
· small	246,253	246,066	1.00	-
· small with units	190,817	190,778	1.00	-
· small with variables	105,567	104,892	0.99	-
· small with variables of units	75,027	74,719	1.00	-
· large	103,954	104,082	1.00	+
· large with polyfills	37,166	37,155	1.00	-
· complex	23,557	23,557	1.00
· unsupported	149,291	152,141	1.02	+
· simple merge	163,416	162,824	1.00	-
· wide merge	17,891	17,896	1.00	+
· deep merge	17,549	17,271	0.98	-
· themed merge	32,094	31,823	0.99	-