Add an alias to the shopify theme serve command

[karreiro]

WHY are these changes introduced?

Some theme developers are used to call shopify theme serve.

WHAT is this pull request doing?

This PR introduces an alias with a warning to the shopify theme serve command.

How to test your changes?

Post-release steps

None.

Measuring impact

How do we know this change was effective? Please choose one:

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix
• Existing analytics will cater for this addition
• PR includes analytics changes to measure impact

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've made sure that any changes to dev or deploy have been reflected in the internal flowchart.

[github-actions]

Benchmark report

The following table contains a summary of the startup time for all commands.

Status	Command	Baseline (avg)	Current (avg)	Diff
🟢	app build	901.33 ms	904.33 ms	0.33 %
🟢	app deploy	1099.67 ms	1100.33 ms	0.06 %
🟢	app dev	1091.33 ms	1091.33 ms	0 %
🟢	app env pull	1004 ms	1000.33 ms	-0.37 %
🟢	app env show	990.67 ms	1008.67 ms	1.82 %
🟢	app generate extension	1056 ms	1055.67 ms	-0.03 %
🟢	app generate schema	1011 ms	1036 ms	2.47 %
🟢	app info	1002.67 ms	1011 ms	0.83 %
🟢	app scaffold extension	1061 ms	1068.67 ms	0.72 %
🟢	app update-url	978 ms	988.67 ms	1.09 %
🟢	theme check	848.67 ms	849.67 ms	0.12 %
🟢	theme delete	952 ms	946.67 ms	-0.56 %
🟢	theme dev	945.67 ms	956 ms	1.09 %
🟢	theme help-old	834.33 ms	856 ms	2.6 %
🟢	theme info	879.33 ms	902.33 ms	2.62 %
🟢	theme init	864.67 ms	865.67 ms	0.12 %
🟢	theme language-server	833.33 ms	837.67 ms	0.52 %
🟢	theme list	947 ms	955 ms	0.84 %
🟢	theme open	958.33 ms	964.67 ms	0.66 %
🟢	theme package	898 ms	894 ms	-0.45 %
🟢	theme publish	954.33 ms	955 ms	0.07 %
🟢	theme pull	947.67 ms	956 ms	0.88 %
🟢	theme push	947.67 ms	950.67 ms	0.32 %
⚪️	theme serve	N/A	951,938,939 ms	N/A
🟢	theme share	948.67 ms	948.67 ms	0 %
🟢	webhook trigger	952 ms	953 ms	0.11 %

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	70.95% (-0.09% 🔻)	3758/5297
🟡	Branches	67.98% (+0.08% 🔼)	1654/2433
🟡	Functions	69.32% (-0.25% 🔻)	976/1408
🟡	Lines	72.04% (-0.11% 🔻)	3581/4971

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🔴	... / theme.ts	39.13% (-26.09% 🔻)	0% (-50% 🔻)	18.18% (-27.27% 🔻)	40.91% (-27.27% 🔻)
🔴	... / output.ts	47.22% (-14.68% 🔻)	25% (-5% 🔻)	55.56% (-11.11% 🔻)	45.16% (-19.54% 🔻)
🟢	... / ConcurrentOutput.tsx	100% (+3.57% 🔼)	80% (-10.91% 🔻)	100% (+7.69% 🔼)	100%
🔴	... / ui.tsx	28.57% (-3.25% 🔻)	50% (+50% 🔼)	31.58%	33.33% (-3.51% 🔻)

Test suite run success

957 tests passing in 485 suites.

Report generated by 🧪jest coverage report action from b1ac7e4

[pepicrft]

I love the conciseness of this PR 👏🏼