CRUD operations for Posts

- added all CRUD operations for Post model
- add() also creates POST_BY_MEMBER and POST_FROM_NETWORK edges
- delete() also deletes associated edges
- delete() currently does not reallocate node/edge indices after deleting
- will write the data to the db.json file and global.db.nodes

server/db/schemas.js

@@ -47,9 +47,11 @@ export let PAYMENT = z.object({
 })
 
 export let POST = z.object({
+    id: z.number(),
     text: z.string(),
     time: z.string(),
-    sentBy: z.string()
+    sentBy: z.string(),
+    edited: z.boolean()
 })
 
 export let CONVSRSATION =  z.object({