Merge branch 'arshavir/NNS1-2261' into 'master'

feat(NNS1-2261): Add examples for `confirmation_text` and `restricted_countries` to SNS-CLI's `init-config-file new` sub-command

This MR adds examples for `` and `` fields of the sns_init.yaml file.

When running `sns-cli init-config-file new`, the user will observe the following in sns_init.yaml: 

```
# SNS SWAP
#
# An optional text that swap participants should confirm before they may
# participate in the swap. If the field is set, its value should be plain text
# with at least 1 and at most 1,000 characters.
#
# Example: "Please confirm that 2+2=4"
#
confirmation_text: ~
#
#
# An optional set of countries that should not participate in the swap. If the
# field is set, it must contain (upper case) ISO 3166-1 alpha-2 country codes.
#
# Example: ["CH", "FR"]
#
restricted_countries: ~
```

Closes NNS1-2261 

Closes NNS1-2261

See merge request dfinity-lab/public/ic!12605

Author: aterga

rs/sns/cli/src/init_config_file.rs

@@ -586,6 +586,8 @@ pub fn get_config_file_contents(sns_cli_init_config: SnsCliInitConfig) -> String
 # An optional text that swap participants should confirm before they may
 # participate in the swap. If the field is set, its value should be plain text
 # with at least 1 and at most 1,000 characters.
+#
+# Example: "Please confirm that 2+2=4"
 #"##
             .to_string(),
         ),
@@ -595,6 +597,8 @@ pub fn get_config_file_contents(sns_cli_init_config: SnsCliInitConfig) -> String
 #
 # An optional set of countries that should not participate in the swap. If the
 # field is set, it must contain (upper case) ISO 3166-1 alpha-2 country codes.
+#
+# Example: ["CH", "FR"]
 #"##
             .to_string(),
         ),