feat: support editable installs for pixi build

- `pixi build` will always send `editable=false`
- `pixi install` will send `editable=true` for the `python-build-backend`

crates/pixi_build_types/src/procedures/conda_build.rs

@@ -43,6 +43,12 @@ pub struct CondaBuildParams {
     ///
     /// The directory may not yet exist.
     pub work_directory: PathBuf,
+
+    /// Install the package in editable mode
+    /// This is supported by many languages without an explicit compile step like Python
+    /// When this parameter is set, changes in the source code will be reflected
+    /// without a rebuild
+    pub editable: bool,
 }
 
 /// Identifier of an output.

src/build/mod.rs

@@ -281,6 +281,7 @@ impl BuildContext {
                         .key(),
                     ),
                     variant_configuration: self.variant_config.clone(),
+                    editable: todo!(),
                 },
                 build_reporter.as_conda_build_reporter(),
             )

src/cli/build.rs

@@ -167,6 +167,7 @@ pub async fn execute(args: Args) -> miette::Result<()> {
                 outputs: None,
                 work_directory: work_dir.path().to_path_buf(),
                 variant_configuration: Some(Default::default()),
+                editable: false,
             },
             progress.clone(),
         )