Add stdlib functions for getting sketch profile start and its components (#2373)

* Add stdlib functions for getting sketch profile start and its components

* Fix it up and actually generate snapshots

* cargo fmt

* Use `.to` instead of `.from`

* Update docs with EXPECTORATE=overwrite

* Add README

* fmt

* Update flow test to account for more autocompletion options when typing "start"

---------

Co-authored-by: Jess Frazelle <jessfraz@users.noreply.github.com>

src/wasm-lib/kcl/src/std/sketch.rs

@@ -12,7 +12,7 @@ use crate::{
     errors::{KclError, KclErrorDetails},
     executor::{
         BasePath, ExtrudeGroup, ExtrudeSurface, Face, GeoMeta, MemoryItem, Path, Plane, PlaneType, Point2d, Point3d,
-        Position, Rotation, SketchGroup, SketchGroupSet, SketchSurface, SourceRange,
+        Position, Rotation, SketchGroup, SketchGroupSet, SketchSurface, SourceRange, UserVal,
     },
     std::{
         utils::{
@@ -1214,6 +1214,78 @@ pub(crate) async fn inner_start_profile_at(
     Ok(Box::new(sketch_group))
 }
 
+/// Returns the X component of the sketch profile start point.
+pub async fn profile_start_x(args: Args) -> Result<MemoryItem, KclError> {
+    let sketch_group: Box<SketchGroup> = args.get_sketch_group()?;
+    let x = inner_profile_start_x(sketch_group)?;
+    args.make_user_val_from_f64(x)
+}
+
+/// ```no_run
+/// const sketch001 = startSketchOn('XY')
+///  |> startProfileAt([5, 2], %)
+///  |> angledLine([-26.6, 50], %)
+///  |> angledLine([90, 50], %)
+///  |> angledLineToX({ angle: 30, to: profileStartX(%) }, %)
+/// ```
+#[stdlib {
+    name = "profileStartX"
+}]
+pub(crate) fn inner_profile_start_x(sketch_group: Box<SketchGroup>) -> Result<f64, KclError> {
+    Ok(sketch_group.start.to[0])
+}
+
+/// Returns the Y component of the sketch profile start point.
+pub async fn profile_start_y(args: Args) -> Result<MemoryItem, KclError> {
+    let sketch_group: Box<SketchGroup> = args.get_sketch_group()?;
+    let x = inner_profile_start_y(sketch_group)?;
+    args.make_user_val_from_f64(x)
+}
+
+/// ```no_run
+/// const sketch001 = startSketchOn('XY')
+///  |> startProfileAt([5, 2], %)
+///  |> angledLine({ angle: -60, length: 14 }, %)
+///  |> angledLineToY({ angle: 30, to: profileStartY(%) }, %)
+/// ```
+#[stdlib {
+    name = "profileStartY"
+}]
+pub(crate) fn inner_profile_start_y(sketch_group: Box<SketchGroup>) -> Result<f64, KclError> {
+    Ok(sketch_group.start.to[1])
+}
+
+/// Returns the sketch profile start point.
+pub async fn profile_start(args: Args) -> Result<MemoryItem, KclError> {
+    let sketch_group: Box<SketchGroup> = args.get_sketch_group()?;
+    let point = inner_profile_start(sketch_group)?;
+    Ok(MemoryItem::UserVal(UserVal {
+        value: serde_json::to_value(point).map_err(|e| {
+            KclError::Type(KclErrorDetails {
+                message: format!("Failed to convert point to json: {}", e),
+                source_ranges: vec![args.source_range],
+            })
+        })?,
+        meta: Default::default(),
+    }))
+}
+
+/// ```no_run
+/// const sketch001 = startSketchOn('XY')
+///  |> startProfileAt([5, 2], %)
+///  |> angledLine({ angle: 120, length: 50 }, %, 'seg01')
+///  |> angledLine({ angle: segAng('seg01', %) + 120, length: 50 }, %)
+///  |> lineTo(profileStart(%), %)
+///  |> close(%)
+///  |> extrude(20, %)
+/// ```
+#[stdlib {
+    name = "profileStart"
+}]
+pub(crate) fn inner_profile_start(sketch_group: Box<SketchGroup>) -> Result<[f64; 2], KclError> {
+    Ok(sketch_group.start.to)
+}
+
 /// Close the current sketch.
 pub async fn close(args: Args) -> Result<MemoryItem, KclError> {
     let (sketch_group, tag): (Box<SketchGroup>, Option<String>) = args.get_sketch_group_and_optional_tag()?;