Add ability to create named constant without code (#5840)

* Add support for forcing kcl input create variable

* Command palette padding tweak

* Make traverse function work for ExpressionStatements

* Add utilities for getting earliest safe index in AST

* Fix the insertIndex logic to not be based on the selection anymore

* Add workflow to create a named constant

* Fix bug with nameEndInDigits matcher

* Tweak command config

* Add a three-dot menu to feature tree pane to create parameters

* Add E2E test for create parameter flow

* Remove edit flow oops

* Fix tsc error

* Fix E2E test

* Update named constant position in edit flow test

* Add tags into consideration for safe insert index

Per @Irev-dev's helpful feedback, with unit tests!

src/lib/commandBarConfigs/modelingCommandConfig.ts

@@ -92,6 +92,9 @@ export type ModelingCommandSchema = {
     axis: string
     length: KclCommandValue
   }
+  'event.parameter.create': {
+    value: KclCommandValue
+  }
   'change tool': {
     tool: SketchTool
   }
@@ -582,6 +585,22 @@ export const modelingMachineCommandConfig: StateMachineCommandSetConfig<
       },
     },
   },
+  'event.parameter.create': {
+    displayName: 'Create parameter',
+    description: 'Add a named constant to use in geometry',
+    icon: 'make-variable',
+    status: 'development',
+    needsReview: false,
+    args: {
+      value: {
+        inputType: 'kcl',
+        required: true,
+        createVariable: 'force',
+        variableName: 'myParameter',
+        defaultValue: '5',
+      },
+    },
+  },
   'Constrain length': {
     description: 'Constrain the length of one or more segments.',
     icon: 'dimension',
@@ -596,7 +615,7 @@ export const modelingMachineCommandConfig: StateMachineCommandSetConfig<
       length: {
         inputType: 'kcl',
         required: true,
-        createVariableByDefault: true,
+        createVariable: 'byDefault',
         defaultValue(_, machineContext) {
           const selectionRanges = machineContext?.selectionRanges
           if (!selectionRanges) return KCL_DEFAULT_LENGTH
@@ -636,7 +655,7 @@ export const modelingMachineCommandConfig: StateMachineCommandSetConfig<
       namedValue: {
         inputType: 'kcl',
         required: true,
-        createVariableByDefault: true,
+        createVariable: 'byDefault',
         variableName(commandBarContext, machineContext) {
           const { currentValue } = commandBarContext.argumentsToSubmit
           if (