Meltano

<https://github.com/meltano/meltano/pull/10022|#10022 docs: Document `meltano state export` and `meltano state import`>
Pull request opened by <https://github.com/edgarrmondragon|edgarrmondragon>
*Description*

Follows <https://github.com/meltano/meltano/pull/10020|#10020>.

*Checklist*

• I have read the <https://docs.meltano.com/contribute/merge/|contribution guide>

*Was generative AI tooling used to co-author this PR?*

• Yes (please specify the tool below)

*Related Issues*

• Closes #XXXX

*Summary by Sourcery*

Document the new `meltano state export` and `meltano state import` CLI subcommands and their usage within the state management reference.
Documentation:
• Add reference documentation for exporting Meltano state as JSON via `meltano state export`, including examples for backups and backend migration.
• Add reference documentation for importing Meltano state from JSON via `meltano state import`, including stdin/file usage and parameter details.
<https://github.com/meltano/meltano|meltano/meltano>

<https://github.com/meltano/meltano/pull/10022|#10022 docs: Document `meltano state export` and `meltano state import`>
Pull request merged by <https://github.com/edgarrmondragon|edgarrmondragon>
<https://github.com/meltano/meltano|meltano/meltano>