Move renderEnv's methods into env.go, a table's route and draw steps into table.go, and the compiled read into arm.go

README.md

@@ -957,17 +957,18 @@ fejkdata.go     Generator, New, options, List
 shipped.go      the embedded data set, and loading a shipped category on the first call reaching it
 shippedindex.go the index of shipped categories, generated from data/
 node.go         the node model and JSON -> node compilation
-table.go        tables: their options, format and cells, and the link to the parent beside them
+table.go        tables: their options, format and cells, the link to the parent beside them, and how a path passes and draws a table
 name.go         names: {x as n} bindings, the scopes they live in, and the reads they answer
 namefence.go    the load fences over names
 pick.go         a render's named picks: the frames of the name scopes rendering, the memo a pick keeps, and the reads kept under it
-env.go          renderEnv: what a render reads names and rows through
+env.go          renderEnv: what a render reads names and rows through, and the frames a read opens and finds
 path.go         the dotted-path walks, and proving a path reaches a node
 render.go       Fake, the recursive renderer (choices, format strings, expansions) and the reads its tokens make
 record.go       records: Record, the JSON/CSV/SQL serializers, and their entry points
 struct.go       structs: FakeStruct, fake tags as one record's columns, and a field's Go type as its column's datatype
 inline.go       inline templates: Template, NewTemplate, FakeTemplate, IsTemplate, and their compile and resolve
-format.go       a format's tokens checked against their fields, and compiled
+format.go       a format's tokens checked against their fields, and compiled into ops
+arm.go          the compiled read: an arm, the path from its head to its leaf, and the op holding it
 reference.go    one reference's resolution: its sigil, its category, its tail
 resolve.go      resolving templates against the assembled tree in steps, each over every template before the next
 graph.go        the node graph: tree walks, containment and render edges, and the cycle and repeat fences