Update README.md and Makefile to prep for release

Makefile

@@ -9,8 +9,6 @@ all: deps build
 .PHONY: deps
 .ONESHELL: deps
 deps:
-	export GOPRIVATE="buf.build/gen/go,${GOPRIVATE}"
-	buf registry login
 	go mod download
 
 # Build the binary

README.md

@@ -1,6 +1,10 @@
 # Santa Rule Importer (santaruleimporter)
 
-This project reads all rules out of either a [Moroz](https://github.com/groob/moroz) TOML config or [Rudolph](https://github.com/airbnb/rudolph/tree/master) [CSV rule export](https://github.com/airbnb/rudolph/blob/master/docs/rules.md#importing-or-exporting-rules) and imports it into a Workshop instance using the API.
+This project reads all rules out of either a
+[Moroz](https://github.com/groob/moroz) TOML config or
+[Rudolph](https://github.com/airbnb/rudolph/tree/master) [CSV rule
+export](https://github.com/airbnb/rudolph/blob/master/docs/rules.md#importing-or-exporting-rules)
+or a Zentral server and imports it into a Workshop instance using the API.
 
 # Table of Contents
 
@@ -17,75 +21,35 @@ Run the following:
 - Export `WORKSHOP_API_KEY` with your Workshop API key which must have the superadmin role.
 - run ./santa-rule-importer
 
-## Example
-
-```shell
-$  make deps
-export GOPRIVATE="buf.build/gen/go,"
-buf registry login
-Opening your browser to complete authorization process.
-
-If your browser doesn't open automatically, please open this URL in a browser to complete the process:
-
-https://buf.build/settings/user/device?code=MXXX-XXXX
-
-Logged in as user. Credentials saved to /Users/user/.netrc.
-go mod tidy
-[ user@Mac (11:45PM) ~/santaruleimporter  ]
-$  make build
-go build -o santa-rule-importer ./cmd/main.go
-[ user@Mac (11:45PM) ~/santaruleimporter  ]
-$  ./santa-rule-importer -insecure ./internal/morozconfig/testdata/global.toml nps.workshop.cloud
-2/2 rules added successfully!
-```
-
 # Building
 
-You need access to NPS' prebuilt Go packages that are hosted in a private
-registry on buf.build.
-
-Assuming you have access to the registry you can run:
-
-```shell
-prompt$ make deps  # get the dependencies and buf
-prompt$ make build # build the binary
 ```
-
-## Build Details
-
-This does the following:
-
-```shell
-prompt$ export GOPRIVATE="buf.build/gen/go,${GOPRIVATE}"
-prompt$ buf registry login
-Opening your browser to complete authorization process.
-
-If your browser doesn't open automatically, please open this URL in a browser to complete the process:
-
-https://buf.build/settings/user/device?code=[REDACTED]
-
-Logged in as user. Credentials saved to /Users/user/.netrc.
-prompt$ go mod download
-```
-
-You can now build the importer.
-
-```shell
-prompt$ go build -o moroz-rule-importer ./cmd/main.go
+prompt$ make build # build the binary
 ```
 
 # Usage
 
 ```
-$  ./santa-rule-importer 
+$  ./santa-rule-importer --help
 Usage: ./santa-rule-importer [OPTIONS] <path to config.toml|path to config.csv> <server>
 
-santa-rule-importer - tool to import rules from Moroz and Rudolph to Workshop
+santa-rule-importer - tool to import rules from Moroz, Rudolph, and Zentral to Workshop
 
 This tool expects the Workshop API Key to be in the WORKSHOP_API_KEY env var
+For Zentral imports, set ZENTRAL_API_KEY env var with your Zentral API token
 
   -insecure
     	Use insecure connection
+  -use-custom-msg-as-comment
+    	Use custom message as comment (moroz only)
+  -zentral-config-id int
+    	Filter Zentral rules by configuration ID
+  -zentral-target-identifier string
+    	Filter Zentral rules by target identifier
+  -zentral-target-type string
+    	Filter Zentral rules by target type (BINARY, CERTIFICATE, etc.)
+  -zentral-url string
+    	Zentral base URL (e.g., zentral.example.com)
 
   Example Usage:
 	./santa-rule-importer global.toml nps.workshop.cloud