[DNM] add function test command

[lopert]

Pulling the test command out of the prototype and cleaning it up.

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	78.4% (-0.09% 🔻)	13543/17275
🟡	Branches	72.52% (+0.07% 🔼)	6589/9086
🟡	Functions	78.62% (-0.17% 🔻)	3520/4477
🟡	Lines	78.75% (-0.1% 🔻)	12804/16260

Show new covered files 🐣

St.❔	File	Statements	Branches	Functions	Lines
🔴	... / test.ts	0%	0%	0%	0%
🔴	... / test-command-runner.ts	51.95%	60.87%	40.91%	51.95%
🔴	... / spin-cache.ts	0%	100%	0%	0%
🟢	... / spin.ts	97.5%	68%	100%	97.44%

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / deploy.ts	96.25% (-1.12% 🔻)	90.48% (-3.64% 🔻)	100%	97.37% (+0.07% 🔼)
🟢	... / id-matching.ts	98.89% (-0.01% 🔻)	92% (-0.86% 🔻)	100%	98.57% (-0.02% 🔻)
🟢	... / otel-metrics.ts	89.74%	70.83% (-3.08% 🔻)	85.71%	89.47%
🟢	... / session.ts	89.6%	77.17% (-0.35% 🔻)	91.67%	88.98%
🟢	... / fqdn.ts	94.55% (-1.01% 🔻)	90.32% (-0.98% 🔻)	100%	94.55% (-1.01% 🔻)

Test suite run success

3243 tests passing in 1359 suites.

Report generated by 🧪jest coverage report action from 310b568