fix(store): remove deprecated stuff

[arturovt]

This commit removes all deprecated items from the public API of @ngxs/store. Everything that was deprecated has been relocated to @ngxs/store/internals and prefixed with the ɵ symbol.

[nx-cloud]

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✅ Successfully ran 6 targets

• nx run-many --target=test --all --configuration=ci --base=remotes/origin/master --head=HEAD
• nx run-many --target=lint --all --configuration=ci --base=remotes/origin/master --head=HEAD
• nx lint-types store
• nx run-many --target=build --all
• nx run-many --target=test --all --configuration=ci --maxWorkers=4
• nx run-many --target=lint --all

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[bundlemon]

BundleMon (Integration Projects)

Files updated (1)

Status	Path	Size	Limits
✅	Main bundles(Gzip) hello-world-ng16/dist-integration/main.(hash) .js	66.93KB (-20B -0.03%)	+1%

Unchanged files (1)

Status	Path	Size	Limits
✅	Main bundles(Gzip) hello-world-ng17/dist-integration/main.(hash) .js	68.43KB	+1%

Total files change -30B -0.02%

Final result: ✅

View report in BundleMon website ➡️

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Current branch size history | Target branch size history