pixi, pixi-{config,global,project,task}: add page (#13249)

pages/common/pixi-project.md

@@ -0,0 +1,24 @@
+# pixi project
+
+> Modify the project configuration file.
+> More information: <https://pixi.sh/latest/reference/cli/#project>.
+
+- Manage project channels:
+
+`pixi project channel {{command}}`
+
+- Manage project description:
+
+`pixi project description {{command}}`
+
+- Manage project platform:
+
+`pixi project platform {{command}}`
+
+- Manage project version:
+
+`pixi project version {{command}}`
+
+- Manage project environment:
+
+`pixi project environment {{command}}`