feat(svg-editor): Implement SVG shape loading and editing functionality

- Add SVG shape loading from disk, allowing users to customize shapes by placing SVG files in the designated directory.
- Introduce a new `ShapeCatalog` to manage SVG shapes, prioritizing user-defined shapes over built-in templates.
- Implement an SVG editor with node-based editing capabilities, enabling users to manipulate SVG paths directly.
- Create a new `SvgEditable` structure to represent editable SVG shapes, supporting operations like adding, removing, and moving nodes.
- Enhance the GUI with an SVG editor panel for visual editing of SVG shapes, including controls for node manipulation and saving changes.
- Ensure compatibility with existing shape tools and maintain a seamless user experience across the application.

Cargo.lock

@@ -1199,6 +1199,15 @@ dependencies = [
  "dirs-sys 0.4.1",
 ]
 
+[[package]]
+name = "dirs"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
+dependencies = [
+ "dirs-sys 0.5.0",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.3.7"
@@ -1206,7 +1215,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1b1d1d91c932ef41c0f2663aa8b0ca0342d444d842c06914aa0a7e352d0bada6"
 dependencies = [
  "libc",
- "redox_users",
+ "redox_users 0.4.6",
  "winapi",
 ]
 
@@ -1218,10 +1227,22 @@ checksum = "520f05a5cbd335fae5a99ff7a6ab8627577660ee5cfd6a94a6a929b52ff0321c"
 dependencies = [
  "libc",
  "option-ext",
- "redox_users",
+ "redox_users 0.4.6",
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "dirs-sys"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e01a3366d27ee9890022452ee61b2b63a67e6f13f58900b651ff5665f0bb1fab"
+dependencies = [
+ "libc",
+ "option-ext",
+ "redox_users 0.5.2",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "dispatch"
 version = "0.2.0"
@@ -2612,6 +2633,7 @@ name = "hcie-engine-api"
 version = "0.1.0"
 dependencies = [
  "approx",
+ "dirs 6.0.0",
  "hcie-blend",
  "hcie-brush-engine",
  "hcie-composite",
@@ -2639,6 +2661,7 @@ dependencies = [
  "serde",
  "serde_json",
  "sha2",
+ "usvg 0.43.0",
 ]
 
 [[package]]
@@ -5389,6 +5412,17 @@ dependencies = [
  "thiserror 1.0.69",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4e608c6638b9c18977b00b475ac1f28d14e84b27d8d42f70e0bf1e3dec127ac"
+dependencies = [
+ "getrandom 0.2.17",
+ "libredox",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "regex"
 version = "1.12.4"