feat(buf): Add Buf module (#3661)

* Add initial Buf module logic

* Add tests for Buf module

* Add initial draft of docs

* cargo fmt

* Fix config table formatting

* Run dprint

* Run clippy --fix

* cargo fmt

* Add space after emoji

* Fix spacing discrepancy

* Switch to Nerd Font from emoji

* Fix up docs merge conflict handling

Co-authored-by: Matan Kushner <hello@matchai.dev>

src/configs/mod.rs

@@ -6,6 +6,7 @@ use starship_module_config_derive::ModuleConfig;
 pub mod aws;
 pub mod azure;
 pub mod battery;
+pub mod buf;
 pub mod character;
 pub mod cmake;
 pub mod cmd_duration;
@@ -90,6 +91,7 @@ pub struct FullConfig<'a> {
     aws: aws::AwsConfig<'a>,
     azure: azure::AzureConfig<'a>,
     battery: battery::BatteryConfig<'a>,
+    buf: buf::BufConfig<'a>,
     character: character::CharacterConfig<'a>,
     cmake: cmake::CMakeConfig<'a>,
     cmd_duration: cmd_duration::CmdDurationConfig<'a>,
@@ -171,6 +173,7 @@ impl<'a> Default for FullConfig<'a> {
             aws: Default::default(),
             azure: Default::default(),
             battery: Default::default(),
+            buf: Default::default(),
             character: Default::default(),
             cmake: Default::default(),
             cmd_duration: Default::default(),