Add --strict flag to theme push to enforce theme check before pushing

[jamesmengo]

WHY are these changes introduced?

Adds a new --strict flag to the theme push command that enforces theme check validation before allowing files to be pushed to a remote theme.

WHAT is this pull request doing?

Adds a new --strict flag to the theme push command that:

• Runs theme check validation before pushing files
• Blocks the push operation if any theme check errors are found (warnings are allowed)
• Displays offense information and summary to help developers fix issues
• Passes the output format down to theme check if JSON is specified
• Adds tests

How to test your changes?

1. Create a theme with some theme check violations
2. Run theme push --strict
3. Verify the command fails and displays theme check offenses
4. Fix the violations
5. Run theme push --strict again
6. Verify the push succeeds with no violations

Errors

Warnings

Measuring impact

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	74.56% (-0.71% 🔻)	8554/11472
🟡	Branches	70.36% (-0.3% 🔻)	4173/5931
🟡	Functions	74.1% (-0.8% 🔻)	2246/3031
🟡	Lines	75.11% (-0.72% 🔻)	8090/10771

Show new covered files 🐣

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / bundler.ts	100%	100%	100%	100%

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / app.test-data.ts	91.44% (-1.07% 🔻)	93.4%	81.25% (-2.5% 🔻)	90.86% (-1.14% 🔻)
🟢	... / release.ts	93.33%	58.33% (-11.67% 🔻)	75%	92.86%
🟢	... / app-event-watcher.ts	90.67% (-4.07% 🔻)	80% (-10.91% 🔻)	90.48%	95.52% (-3.01% 🔻)
🟢	... / app-watcher-esbuild.ts	83.33% (-5.56% 🔻)	87.5%	80% (-6.67% 🔻)	87.88% (-6.06% 🔻)
🔴	... / dev-session.ts	4.21% (-81.75% 🔻)	0% (-68.33% 🔻)	4.35% (-87.32% 🔻)	4.76% (-88.17% 🔻)
🟢	... / Replay.tsx	91.67% (-0.33% 🔻)	69.23%	100%	91.3% (-0.36% 🔻)
🔴	... / app-management-client.ts	20.33% (-4.99% 🔻)	9.52% (-3.73% 🔻)	22.11% (-4.49% 🔻)	18.75% (-5.23% 🔻)

Test suite run success

1949 tests passing in 886 suites.

Report generated by 🧪jest coverage report action from c94de67

[jamesmengo]

• [Themes] Theme Dev - Display theme asset upload errors in overlay #4899
• Add --strict flag to theme push to enforce theme check before pushing #4900 👈 (View in Graphite)
• main

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[EvilGenius13]

🚀 Looks good!

[github-actions]

Differences in type declarations

We detected differences in the type declarations generated by Typescript for this branch compared to the baseline ('main' branch). Please, review them to ensure they are backward-compatible. Here are some important things to keep in mind:

• Some seemingly private modules might be re-exported through public modules.
• If the branch is behind main you might see odd diffs, rebase main into this branch.

New type declarations

We found no new type declarations in this PR

Existing type declarations

packages/cli-kit/dist/public/node/git.d.ts

@@ -97,6 +97,13 @@ export declare class OutsideGitDirectoryError extends AbortError {
  * @param directory - The directory to check.
  */
 export declare function ensureInsideGitDirectory(directory?: string): Promise<void>;
+/**
+ * Returns true if the given directory is inside a .git directory tree.
+ *
+ * @param directory - The directory to check.
+ * @returns True if the directory is inside a .git directory tree.
+ */
+export declare function insideGitDirectory(directory?: string): Promise<boolean>;
 export declare class GitDirectoryNotCleanError extends AbortError {
 }
 /**