chore: add snapshot release pipelines

[tatomyr]

What/Why/How?

Added experimental release flow:

To release an experimental version to the NPM registry, follow these steps:

1. Create a new PR to main.
2. Add the snapshot label to the PR. This creates a new PR with to the snapshot branch (which is a copy of the main branch).
3. Merging the second PR triggers release to the NPM registry under the snapshot tag.

The released version can be installed with npm install @redocly/cli@snapshot or using the released version directly.

Reference

Testing

Tested in this PR.

Screenshots (optional)

Check yourself

• Code changed? - Tested with redoc/reference-docs/workflows (internal)
• All new/updated code is covered with tests
• New package installed? - Tested in different environments (browser/node)

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[changeset-bot]

⚠️ No Changeset found

Latest commit: 91f11e2

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	990.7 ± 30.4	955.0	1057.0	1.01 ± 0.03
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	980.3 ± 12.9	961.7	1008.6	1.00

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	78.63%	5047/6419
🟡	Branches	67.28%	2056/3056
🟡	Functions	73.13%	833/1139
🟡	Lines	78.92%	4761/6033

Test suite run success

835 tests passing in 120 suites.

Report generated by 🧪jest coverage report action from 91f11e2

[RomanHotsiy]

Let's rename it to rc or beta

[tatomyr]

Renamed to snapshot as disscussed.