feat: add '{previous}' placeholder support with getPreviousContent function

feat: add support for moving 'previous' metadata to 'page_previous' in llm_client process method

refactor: simplify template and example content handling in llm_client.php

refactor: disable create action and simplify template handling

feat: pass page_template to getTemplateContent when available

refactor: use 'pageId' instead of 'templateIds' in getTemplateContent

feat: add pageId parameter to getTemplateContent to bypass ChromaDB query

fix: correct placeholder key for examples content in LLM client

feat: rename 'template' metadata key to 'page_template' in process method

refactor: rename 'examples' to 'page_examples' in metadata processing

refactor: rename example_pages to examples and update content handling

refactor: rename 'examples' placeholder to 'example_pages'

refactor: move example content processing to correct switch case location

refactor: add text, think, and action to metadata and use metadata for prompt loading

feat: add '{examples}' placeholder with getExamplesContent function to retrieve and format example page contents as XML elements

refactor: rename getExamplesContent to getSnippets for consistency with placeholder naming

fix: change placeholder from '{examples}' to '{snippets}'

feat: wrap examples content in XML tags for get_examples tool call

fix: remove XML wrapper tags from examples list output

refactor: create convenience functions for template and examples retrieval

feat: auto-populate missing prompt placeholders with ChromaDB values

feat: add function to scan text for placeholders and return list of found placeholders

fix: ignore exceptions when loading command-specific system prompt

Co-authored-by: aider (openrouter/qwen/qwen3-coder:free) <aider@aider.chat>

refactor: simplify command-specific system prompt loading logic

refactor: simplify action processing logic in dokullm plugin