API: Move and rename purchased server functions to cloud API (#2367)

* Convert purchased server functions to cloud API

- Create `ns.cloud`
- Change `bitnode multipliers` and `server constants` wording for consistency
- change `server`, `ram` and `getting started` docs for consistency
- Added changes to 3.0.0 API Break and `setRemovedFunctions` in NetscriptFunctions.js

Tested by
- running tutorial `purchase-server-8gb.js`, and a more typical player one
- buying manually using vendor (Alpha Ent in Sector 12)
- deleting them all using script, and checked all deleted functions gave correct error
- Imported completed save to ensure auto-transfer of function work

* Revision in line with comments

- changed more `purchased` to `cloud` references
- Added BN mults auto-conversion

* Update getting_started.md

 - Corrected function names for new `cloud API`

* Don't show `cloud API` warning

v3.0.0 API break auto-replaces `cloud` functions, not warning suggested.

* API Break correction

- `cloud` affected API break replacement changed to be more descriptive and functional

* Fix typo and add empty lines

* Update many things (check commit's description)

- Comments
- Terminal message
- UI Text
- TSDoc
- md docs
- Improve error messages in src\NetscriptFunctions\Cloud.ts

src/Documentation/doc/en/programming/game_frozen.md

@@ -36,9 +36,9 @@ Common infinite loop when translating the server purchasing script in starting g
     var ram = 8;
     var i = 0;
 
-    while (i < ns.getPurchasedServerLimit()) {
-        if (ns.getServerMoneyAvailable("home") > ns.getPurchasedServerCost(ram)) {
-            var hostname = ns.purchaseServer("pserv-" + i, ram);
+    while (i < ns.cloud.getServerLimit()) {
+        if (ns.getServerMoneyAvailable("home") > ns.cloud.getRamLimit(ram)) {
+            var hostname = ns.cloud.purchaseServer("cloud-server-" + i, ram);
             ns.scp("early-hack-template.js", hostname);
             ns.exec("early-hack-template.js", hostname, 3);
             ++i;