fix: Remove all uses of @blockly/field-colour from src/** (#174)

* refactor: Move test blocks and toolbox to test/

  AFAICT these are not supposed to be part of the actual plugin,
  so it makes sense to move them to test/.

* fix: Remove unused import of @blockly/field-colour

  This import should have been removed in PR #129 when the code
  that uses it was rewritten.

Fixes #133.

Author: cpcallen

src/line_cursor.ts

@@ -13,7 +13,6 @@
  * @author [email protected] (Abby Schmiedt)
  */
 
-import {FieldColour} from '@blockly/field-colour';
 import * as Blockly from 'blockly/core';
 import {ASTNode, Marker} from 'blockly/core';
 

src/blocks/p5_blocks.js renamed to test/blocks/p5_blocks.js

@@ -10,11 +10,11 @@ import * as libraryBlocks from 'blockly/blocks';
 import {installAllBlocks as installColourBlocks} from '@blockly/field-colour';
 import {KeyboardNavigation} from '../src/index';
 // @ts-expect-error No types in js file
-import {forBlock} from '../src/blocks/p5_generators';
+import {forBlock} from './blocks/p5_generators';
 // @ts-expect-error No types in js file
-import {blocks} from '../src/blocks/p5_blocks';
+import {blocks} from './blocks/p5_blocks';
 // @ts-expect-error No types in js file
-import {toolbox} from '../src/blocks/toolbox.js';
+import {toolbox} from './blocks/toolbox.js';
 // @ts-expect-error No types in js file
 import toolboxCategories from './toolboxCategories.js';
 

src/blocks/p5_generators.js renamed to test/blocks/p5_generators.js

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {p5CategoryContents} from '../src/blocks/toolbox.js';
+import {p5CategoryContents} from './blocks/toolbox.js';
 
 export default {
   kind: 'categoryToolbox',