Add Google and Groq AI providers, enhance provider manager, and implement conversation and logging services

- Introduced `Groq_AI_Provider_Google` and `Groq_AI_Provider_Groq` classes for handling AI interactions with Google and Groq respectively.
- Enhanced `Groq_AI_Provider_Manager` to register and manage multiple AI providers.
- Implemented `Groq_AI_Conversation_Manager` for managing conversation IDs and context hashes.
- Added `Groq_AI_Generation_Logger` for logging AI generation events and managing log tables.
- Developed `Groq_AI_Prompt_Builder` for constructing prompts and processing AI responses.
- Established `Groq_AI_Settings_Manager` for managing plugin settings, including context fields and module configurations.

.gitignore

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+# OS cruft
+.DS_Store
+Thumbs.db
+
+# IDE / tooling
+.idea/
+.vscode/
+*.code-workspace
+
+# Dependencies & builds
+node_modules/
+vendor/
+dist/
+
+# Logs / env
+*.log
+.env*
+
+# Docker artifacts
+docker/wordpress/wp-content/