RDoc-3966 [Python, Node.js, Java] Per-database connection string articles

[Danielle9897]

Issue link

https://issues.hibernatingrhinos.com/issue/RDoc-3966/Python-Node.js-Java-Per-database-connection-string-articles

Additional description

Added Python, Node.js, and Java versions for the per-database connection string articles under:
../integrations/connection-strings/per-database

Type of change

• Content - docs
• Content - cloud
• Content - guides
• Content - start pages/other
• New docs feature (consider updating /templates or readme)
• Bug fix
• Optimization
• Other

Changes in docs URLs

• No changes in docs URLs
• Articles are restructured, URLs will change, mapping is required (update /scripts/redirects.json file, set Documents Moved PR label)

Changes in UX/UI

• No changes in UX/UI
• Changes in UX/UI (include screenshots and description)

[Danielle9897]

============================
Node.js
@M4xymm pls review files:

docs/integrations/connection-strings/per-database/content/_add-or-update-connection-string-nodejs.mdx
docs/integrations/connection-strings/per-database/content/_get-connection-strings-nodejs.mdx
docs/integrations/connection-strings/per-database/content/_remove-connection-string-nodejs.mdx

============================
Python
@poissoncorp pls review files:

docs/integrations/connection-strings/per-database/content/_add-or-update-connection-string-python.mdx
docs/integrations/connection-strings/per-database/content/_get-connection-strings-python.mdx
docs/integrations/connection-strings/per-database/content/_remove-connection-string-python.mdx

============================
Java
@LielNagar pls review files:

docs/integrations/connection-strings/per-database/content/_add-or-update-connection-string-java.mdx
docs/integrations/connection-strings/per-database/content/_get-connection-strings-java.mdx
docs/integrations/connection-strings/per-database/content/_remove-connection-string-java.mdx