update README with MacOS instructions and transform info (#42)

README.md

@@ -3,13 +3,20 @@
 Kantra is an experimental CLI that unifies analysis and transformation capabilities of Konveyor.
 
 ## Installation
+### Linux
 
 Easiest way to install Kantra is to get it via the container image. To download latest container image, run:
 
 ```sh
 podman pull quay.io/konveyor/kantra:latest && podman run --name kantra-download quay.io/konveyor/kantra:latest 1> /dev/null 2> /dev/null && podman cp kantra-download:/usr/local/bin/kantra . && podman rm kantra-download
 ```
 
+### MacOS
+
+```sh
+podman pull quay.io/konveyor/kantra:latest && podman run --name kantra-download quay.io/konveyor/kantra:latest 1> /dev/null 2> /dev/null && podman cp kantra-download:/usr/local/bin/darwin-kantra kantra && podman rm kantra-download
+```
+
 This will copy the binary into your current working directory. To make it available system-wide, run:
 
 ```sh
@@ -87,14 +94,79 @@ Global Flags:
 
 Transform has two subcommands - `openrewrite` and `rules`.
 
+```sh
+Transform application source code or windup XML rules
+
+Usage:
+  kantra transform [flags]
+  kantra transform [command]
+
+Available Commands:
+  openrewrite Transform application source code using OpenRewrite recipes
+  rules       Convert XML rules to YAML
+
+Flags:
+  -h, --help   help for transform
+
+Global Flags:
+      --log-level int   log level (default 5)
+
+Use "kantra transform [command] --help" for more information about a command.
+```
+
 #### OpenRewrite
 
 `openrewrite` subcommand allows running OpenRewrite recipes on source code.
 
 
+```sh
+Transform application source code using OpenRewrite recipes
+
+Usage:
+  kantra transform openrewrite [flags]
+
+Flags:
+  -g, --goal string     target goal (default "dryRun")
+  -h, --help            help for openrewrite
+  -i, --input string    path to application source code directory
+  -l, --list-targets    list all available OpenRewrite recipes
+  -t, --target string   target openrewrite recipe to use. Run --list-targets to get a list of packaged recipes.
+
+Global Flags:
+      --log-level int   log level (default 5)
+```
+
+To run `transform openrewrite` on application source code, run:
+
+```sh
+kantra transform openrewrite --input=<path/to/source/code> --target=<exactly_one_target_from_the_list>
+```
+
 #### Rules
 
 `rules` subcommand allows converting Windup XML rules to analyzer-lsp YAML rules.
 
+```sh
+Convert XML rules to YAML
+
+Usage:
+  kantra transform rules [flags]
+
+Flags:
+  -h, --help                help for rules
+  -i, --input stringArray   path to XML rule file(s) or directory
+  -o, --output string       path to output directory
+
+Global Flags:
+      --log-level int   log level (default 5)
+```
+
+To run `transform rules` on application source code, run:
+
+```sh
+kantra transform rules --input=<path/to/xmlrules> --output=<path/to/output/dir>
+```
+
+
 ## Code of Conduct
 Refer to Konveyor's Code of Conduct [here](https://github.com/konveyor/community/blob/main/CODE_OF_CONDUCT.md).