Implements ifcurl-egi. find_local_repos(genesis) scans directories
from [repo_search] paths in ~/.config/ifcurl/config.toml, computes the
genesis commit of each git repo found, and returns paths whose genesis
matches. Results are cached in ~/.cache/ifcurl/genesis_repos/<genesis>.json
for IFCURL_REPO_CACHE_TTL seconds (default 3600). Recursion stops at repo
boundaries and hidden directories; depth capped at 4 levels. Adds tomli
as a conditional dep for Python <3.11. Unblocks origin remapping (ifcurl-oef)
and ambiguity resolution (ifcurl-77u).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
