(core) move home server into core

Summary: This moves enough server material into core to run a home server.  The data engine is not yet incorporated (though in manual testing it works when ported).

Test Plan: existing tests pass

Reviewers: dsagal

Reviewed By: dsagal

Differential Revision: https://phab.getgrist.com/D2552

app/plugin/FileParserAPI-ti.ts

@@ -0,0 +1,41 @@
+import * as t from "ts-interface-checker";
+// tslint:disable:object-literal-key-quotes
+
+export const EditOptionsAPI = t.iface([], {
+  "getParseOptions": t.func("ParseOptions", t.param("parseOptions", "ParseOptions", true)),
+});
+
+export const ParseFileAPI = t.iface([], {
+  "parseFile": t.func("ParseFileResult", t.param("file", "FileSource"), t.param("parseOptions", "ParseOptions", true)),
+});
+
+export const ParseOptions = t.iface([], {
+  "NUM_ROWS": t.opt("number"),
+  "SCHEMA": t.opt(t.array("ParseOptionSchema")),
+});
+
+export const ParseOptionSchema = t.iface([], {
+  "name": "string",
+  "label": "string",
+  "type": "string",
+  "visible": "boolean",
+});
+
+export const FileSource = t.iface([], {
+  "path": "string",
+  "origName": "string",
+});
+
+export const ParseFileResult = t.iface(["GristTables"], {
+  "parseOptions": "ParseOptions",
+});
+
+const exportedTypeSuite: t.ITypeSuite = {
+  EditOptionsAPI,
+  ParseFileAPI,
+  ParseOptions,
+  ParseOptionSchema,
+  FileSource,
+  ParseFileResult,
+};
+export default exportedTypeSuite;