Renumber docs from v2.12 to v3.0

docs/release-notes/version-3.0.md

@@ -0,0 +1,40 @@
+# NetBox v3.0
+
+## v3.0-beta1 (FUTURE)
+
+### Enhancements
+
+* [#2434](https://github.com/netbox-community/netbox/issues/2434) - Add option to assign IP address upon creating a new interface
+* [#3665](https://github.com/netbox-community/netbox/issues/3665) - Enable rendering export templates via REST API
+* [#4609](https://github.com/netbox-community/netbox/issues/4609) - Allow marking prefixes as fully utilized
+* [#5806](https://github.com/netbox-community/netbox/issues/5806) - Add kilometer and mile as choices for cable length unit
+* [#6154](https://github.com/netbox-community/netbox/issues/6154) - Allow decimal values for cable lengths
+
+### Other Changes
+
+* [#5532](https://github.com/netbox-community/netbox/issues/5532) - Drop support for Python 3.6
+* [#5994](https://github.com/netbox-community/netbox/issues/5994) - Drop support for `display_field` argument on ObjectVar
+* [#6338](https://github.com/netbox-community/netbox/issues/6338) - Decimal fields are no longer coerced to strings in REST API
+
+### REST API Changes
+
+* dcim.Cable
+    * `length` is now a decimal value
+* dcim.Device
+    * Removed the `display_name` attribute (use `display` instead)
+* dcim.DeviceType
+    * Removed the `display_name` attribute (use `display` instead)
+* dcim.Rack
+    * Removed the `display_name` attribute (use `display` instead)
+* dcim.Site
+    * `latitude` and `longitude` are now decimal fields rather than strings
+* extras.ContentType
+    * Removed the `display_name` attribute (use `display` instead)
+* ipam.Prefix
+    * Added the `mark_utilized` boolean field
+* ipam.VLAN
+    * Removed the `display_name` attribute (use `display` instead)
+* ipam.VRF
+    * Removed the `display_name` attribute (use `display` instead)
+* virtualization.VirtualMachine
+    * `vcpus` is now a decimal field rather than a string