Finish up logseq.graph-parser

- Parser now parses all graph files like the app does, not just pages and journals.
  This required extracting another fn from repo-handler
- Add and tweak CI steps that are specific to graph-parser. All
  namespaces in this library are checked for nbb compatibility
- Cleaned up parser cli API so only one fn is needed for scripts
- Tests were updated to match new parsing behavior
- large_vars.clj can run with a smaller max-line-count after only refactoring two fns
- Add docs

deps/graph-parser/.carve/ignore

@@ -1,5 +1,5 @@
 ;; For CLI
-logseq.graph-parser.cli/parse
+logseq.graph-parser.cli/parse-graph
 ;; For CLI
 logseq.graph-parser.db/start-conn
 ;; For CLI