deps.edn :aliases now work the tools.deps way, scoped to what jolt
supports (git/:local, no maven): :extra-paths and :extra-deps
accumulate across selected aliases, :main-opts is last-wins. The CLI
grows -A:dev:test (selects aliases for path/run/repl/-e) and
-M:alias (runs the alias :main-opts through jolt). A user-level
deps.edn ($JOLT_CONFIG, else $XDG_CONFIG_HOME/jolt, else ~/.jolt)
merges under the project file: :deps and :aliases merge per key with
the project winning, everything else replaces.
Resolution is now breadth-first so a top-level coordinate always
beats a transitive one for the same lib (it was DFS first-wins —
a dep's pin could shadow the project's own). Conflicting coordinates
for one lib warn on stderr with both coords and which won. Also
fixes dedup keying: it hashed the symbol struct's string repr, which
carries reader position metadata, so the same lib from two files
never deduped.
resolve-deps-cached keys on project edn + user edn + aliases.
Tests: deps-aliases-test and deps-conflicts-test, local deps only.
