[find] basic spec (withfig#528)

* Basic spec for find

* Using folders template for path arg

dev/find.ts

@@ -0,0 +1,71 @@
+const completionSpec: Fig.Spec = {
+  name: "find",
+  description: "Walk a file hierarchy",
+  args: [
+    {
+      name: "path",
+      isOptional: true,
+      isVariadic: true,
+      template: ["folders"],
+    },
+    {
+      // TODO Suggestions for primaries and operands. See `man find`
+      name: "expression",
+      description: "Composition of primaries and operands",
+      isOptional: true,
+      isVariadic: true,
+    },
+  ],
+  options: [
+    {
+      name: "-E",
+      description:
+        "Interpret regular expressions followed by -regex and -iregex primaries as extended",
+    },
+    {
+      name: "-H",
+      description:
+        "Cause the file information and file type returned for each symbolic link specified to be those referenced by the link",
+      exclusiveOn: ["-L", "-P"],
+    },
+    {
+      name: "-L",
+      description:
+        "Cause the file information and file type returned for each symbolic link to be those of the file referenced by the link",
+      exclusiveOn: ["-H", "-P"],
+    },
+    {
+      name: "-P",
+      description:
+        "Cause the file information and file type returned for each symbolic link to be those for the link itself",
+      exclusiveOn: ["-H", "-L"],
+    },
+    {
+      name: "-X",
+      description: "Permit find to be safely used in conjunction with xargs",
+    },
+    {
+      name: "-d",
+      description: "Cause find to perform a depth-first traversal",
+    },
+    {
+      name: "-f",
+      description: "Specify a file hierarch for find to traverse",
+      args: {
+        name: "path",
+      },
+    },
+    {
+      name: "-s",
+      description:
+        "Cause find to traverse the file hierarchies in lexicographical order",
+    },
+    {
+      name: "-x",
+      description:
+        "Prevent find from descending into directories that have a device number different than that of the file from which the descent began",
+    },
+  ],
+};
+
+export default completionSpec;