fix: Convert vendor/pezkuwi-subxt from submodule to regular directory

vendor/pezkuwi-subxt/cli/README.md

@@ -0,0 +1,58 @@
+# subxt-cli
+
+Utilities for working with substrate metadata for `subxt`
+
+```
+USAGE:
+subxt <SUBCOMMAND>
+
+FLAGS:
+-h, --help
+Prints help information
+
+    -V, --version
+            Prints version information
+
+
+SUBCOMMANDS:
+codegen     Generate runtime API client code from metadata
+help        Prints this message or the help of the given subcommand(s)
+metadata    Download metadata from a substrate node, for use with `subxt` codegen
+```
+
+## Metadata
+
+Use to download metadata for inspection, or use in the `subxt` macro. e.g.
+
+`subxt metadata -f bytes > metadata.scale`
+
+```
+USAGE:
+    subxt metadata [OPTIONS]
+
+OPTIONS:
+    -f, --format <format>    the format of the metadata to display: `json`, `hex` or `bytes` [default: json]
+        --url <url>          the url of the substrate node to query for metadata [default: http://localhost:9933]
+```
+
+## Codegen
+
+Use to invoke the `subxt-codegen` crate which is used by `subxt-macro` to generate the runtime API and types. Useful
+for troubleshooting codegen as an alternative to `cargo expand`, and also provides the possibility to customize the
+generated code if the macro does not produce the desired API. e.g.
+
+`subxt codegen | rustfmt --edition=2018 --emit=stdout`
+
+```
+USAGE:
+    subxt codegen [OPTIONS]
+
+OPTIONS:
+    -f, --file <file>
+            the path to the encoded metadata file
+
+        --url <url>
+            the url of the substrate node to query for metadata for codegen
+
+```
+