feat(api): Add .wit interface

Author: ospencer

api/env.wit

@@ -0,0 +1,46 @@
+enum log-level {
+    null,
+    error,
+    warn,
+    info,
+    debug
+}
+enum http-method {
+    get,
+    head,
+    options,
+    post,
+    put,
+    patch,
+    delete
+}
+enum field-type {
+    meta,
+    body,
+    header,
+    params,
+    state,
+    query
+}
+enum query-type {
+	select,
+	insert,
+	update,
+	delete
+}
+
+return-result: function(res: list<u8>, ident: u32)
+return-error: function(code: s32, res: string, ident: u32)
+log-msg: function(msg: string, level: log-level, ident: u32)
+fetch-url: function(method: http-method, url: string, body: list<u8>, ident: u32) -> s32
+graphql-query: function(endpoint: string, query: string, ident: u32) -> s32
+cache-set: function(key: string, value: list<u8>, ttl: u32, ident: u32) -> s32
+cache-get: function(key: string, ident: u32) -> s32
+request-get-field: function(field-type: field-type, key: string, ident: u32) -> s32
+request-set-field: function(field-type: field-type, key: string, value: list<u8>, ident: u32) -> s32
+resp-set-header: function(key: string, value: list<u8>, ident: u32)
+get-static-file: function(name: string, ident: u32) -> s32
+db-exec: function(query-type: query-type, name: string, ident: u32) -> s32
+get-ffi-result: function(ptr: u32, ident: u32) -> s32
+add-ffi-var: function(name: string, val: string, ident: u32) -> s32
+return-abort: function(msg: string, file: string, line-num: u32, col-num: u32, ident: u32)