fix: command injection, edit_file append, extract_text, and unknown block decoder

remove .vscode settings and add to gitignore

add README documenting the workshop and architecture

step 6: add code_search tool with grep

step 5: add edit_file tool for code modification

step 4: add bash tool for shell command execution

step 3: add list_files tool

step 2: add read_file tool and the agent tool loop

use O(1) prepend for conversation list, reverse on send

add github settings

step 1: basic chat with Claude

add sample files for agent to interact with

step 0: scaffold gleam project with dependencies