[Icons]: Add support for quadratic icons

[fallaciousreasoning]

brave-core build doesn't work with the latest version of Leo because one of the icons it references is using a quadratic path. This updates the .svg ==> .icon converter to support quadratic paths.

You can test the support by opening leo_reading_list_add.icon from main in https://skia-icon-editor.vercel.app/

Additionally, it should crash the build if we encounter more unknown commands, which should prevent us merging any new broken icons

[github-actions]

👋 Thanks for Submitting! This PR is available for preview at the link below.

✅ PR tip preview: https://930.pr.nala.bravesoftware.com/
✅ Commit preview: https://930.pr.nala.bravesoftware.com/commit-ef73b54e7a6e4b41038bbe1de5076353de67b907/

- ./tokens/css/variables-android.old.css: 7390 bytes
+ ./tokens/css/variables-android.css: 7390 bytes
---
- ./tokens/css/variables-browser.old.css: 6848 bytes
+ ./tokens/css/variables-browser.css: 6848 bytes
---
- ./tokens/css/variables-ios.old.css: 7033 bytes
+ ./tokens/css/variables-ios.css: 7033 bytes
---
- ./tokens/css/variables-marketing.old.css: 13501 bytes
+ ./tokens/css/variables-marketing.css: 13501 bytes
---
- ./tokens/css/variables-news.old.css: 526 bytes
+ ./tokens/css/variables-news.css: 526 bytes
---
- ./tokens/css/variables-newtab.old.css: 1933 bytes
+ ./tokens/css/variables-newtab.css: 1933 bytes
---
- ./tokens/css/variables-search.old.css: 2409 bytes
+ ./tokens/css/variables-search.css: 2409 bytes
---
- ./tokens/css/variables-web3.old.css: 905 bytes
+ ./tokens/css/variables-web3.css: 905 bytes
---
- ./tokens/css/variables.old.css: 119512 bytes
+ ./tokens/css/variables.css: 119512 bytes

Variables Diff: variables-android.diff

--- ./tokens/css/variables-android.old.css	2024-12-06 01:05:17.057051770 +0000
+++ ./tokens/css/variables-android.css	2024-12-06 01:04:39.257133806 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 :root {

Variables Diff: variables-browser.diff

--- ./tokens/css/variables-browser.old.css	2024-12-06 01:05:17.445050884 +0000
+++ ./tokens/css/variables-browser.css	2024-12-06 01:04:39.233133796 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 :root {

Variables Diff: variables-ios.diff

--- ./tokens/css/variables-ios.old.css	2024-12-06 01:05:17.749050191 +0000
+++ ./tokens/css/variables-ios.css	2024-12-06 01:04:39.273133814 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 :root {

Variables Diff: variables-marketing.diff

--- ./tokens/css/variables-marketing.old.css	2024-12-06 01:05:18.089049416 +0000
+++ ./tokens/css/variables-marketing.css	2024-12-06 01:04:39.293133823 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 :root {

Variables Diff: variables-news.diff

--- ./tokens/css/variables-news.old.css	2024-12-06 01:05:18.385048728 +0000
+++ ./tokens/css/variables-news.css	2024-12-06 01:04:39.321133835 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 :root {

Variables Diff: variables-newtab.diff

--- ./tokens/css/variables-newtab.old.css	2024-12-06 01:05:18.685048032 +0000
+++ ./tokens/css/variables-newtab.css	2024-12-06 01:04:39.329133838 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 :root {

Variables Diff: variables-search.diff

--- ./tokens/css/variables-search.old.css	2024-12-06 01:05:18.973047362 +0000
+++ ./tokens/css/variables-search.css	2024-12-06 01:04:39.313133832 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 :root {

Variables Diff: variables-web3.diff

--- ./tokens/css/variables-web3.old.css	2024-12-06 01:05:19.273046666 +0000
+++ ./tokens/css/variables-web3.css	2024-12-06 01:04:39.337133842 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 @media (prefers-color-scheme: light) {

Variables Diff: variables.diff

--- ./tokens/css/variables.old.css	2024-12-06 01:05:19.569045978 +0000
+++ ./tokens/css/variables.css	2024-12-06 01:04:39.097133736 +0000
@@ -1,6 +1,6 @@
 /**
  * Do not edit directly
- * Generated on Wed Dec 04 2024 03:46:11 GMT+0000 (Coordinated Universal Time)
+ * Generated on Fri Dec 06 2024 01:04:39 GMT+0000 (Coordinated Universal Time)
  */
 
 :root {