Add OracleDB CDC trigger docs and regenerate Solace connector docs

[gayaldassanayake]

Summary

• Adds a Triggers reference page for the ballerinax/oracledb connector's LogMiner-based CDC listener (listener/service config, supporting types)
• Adds a CDC setup section to the OracleDB setup guide, verified against the connector's tested README (ARCHIVELOG mode, supplemental logging, LogMiner tablespace, CDC user grants)
• Adds a CDC trigger walkthrough to the example page, with screenshots captured from the low-code UI, plus a matching sample in wso2/integration-samples (PR #156)
• Registers the new Triggers page in the sidebar between Actions and Example
• Regenerates the ballerinax/solace connector docs (connector-overview, setup-guide, actions, triggers, example) for the new JCSMP-based implementation (v1.0.0), replacing the old JMS-based content
• Rewrites the conceptual Solace trigger page under develop/integration-artifacts/event to match the new listener/service model
• Bumps the Solace catalog card icon to the v1.0.0 Central icon and updates its operations list
• Adds a matching set of Solace samples in wso2/integration-samples (PR #156)

Related fixes picked up along the way

• Removes the "For CDC" bullet that leaked into the MySQL and PostgreSQL setup guides' generic Prerequisites section, ahead of their own dedicated CDC sections
• Fixes the Oracle DB catalog card icon (was pinned to a stale package version whose icon was a generic placeholder instead of the Oracle logo)
• Adds "CDC" to the Oracle DB catalog card's description/operations so it surfaces when searching "cdc", matching the other database connectors

Test plan

• bal build succeeds for the generated CDC trigger sample
• bal build succeeds for all three rewritten Solace samples
• npm run build (Docusaurus) succeeds with no new broken links
• Reviewed by a maintainer

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