[Observability] Copy Exploratory View into a separate app

[CoenWarmer]

Resolves #153830

📝 Summary

This PR copies the Exploratory View component that was inside the Observability app into its own app.

• URL of new app: app/exploratory-view
• Design and functionality are unchanged.
• All links to the route inside Synthetics and UX have been updated to the new app. The links in APM will be updated in a new PR to keep the PR smaller.
• Git history has been retained for all files in x-pack/plugins/exploratory_view.
• The Exploratory View component inside Observability will be removed in a following PR.

[github-actions]

Documentation preview:

• ✨ Changed pages

[apmmachine]

🤖 GitHub comments

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Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 0ef113b
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Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
exploratoryView	-	207	+207

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
exploratoryView	-	339	+339
observability	644	646	+2
total			+341

Any counts in public APIs

Total count of every any typed public API. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats any for more detailed information.

id	before	after	diff
exploratoryView	-	4	+4

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
exploratoryView	-	242.6KB	⚠️ +242.6KB
synthetics	1.4MB	1.4MB	+33.0B
total			+242.6KB

Public APIs missing exports

Total count of every type that is part of your API that should be exported but is not. This will cause broken links in the API documentation system. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats exports for more detailed information.

id	before	after	diff
exploratoryView	-	17	+17

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
exploratoryView	-	58.6KB	+58.6KB
observability	89.0KB	89.1KB	+148.0B
synthetics	26.8KB	27.1KB	+371.0B
ux	5.9KB	6.1KB	+243.0B
total			+59.4KB

Unknown metric groups

API count

id	before	after	diff
exploratoryView	-	342	+342
observability	650	652	+2
total			+344

async chunk count

id	before	after	diff
exploratoryView	-	12	+12

ESLint disabled in files

id	before	after	diff
exploratoryView	-	3	+3

ESLint disabled line counts

id	before	after	diff
exploratoryView	-	32	+32
securitySolution	433	436	+3
total			+35

References to deprecated APIs

id	before	after	diff
exploratoryView	-	66	+66

Total ESLint disabled count

id	before	after	diff
exploratoryView	-	35	+35
securitySolution	513	516	+3
total			+38

History

• 💔 Build #116170 failed 930d1e648fddccc1879a2f09944cade97a52297d
• 💔 Build #116137 failed 2e38598
• 💔 Build #116083 failed 46d11c8
• 💔 Build #116048 failed f29493e
• 💔 Build #116005 failed 1be81d0

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[maryam-saeidi]

AO changes LGTM

[shahzad31]

Working as standalone app.

Need a follow up to clean up the usage and unrelated files.