feat: Add 'slowTestThreshold' and fix this.slow() inside specs (#18496)

Co-authored-by: Chris Breiding <chrisbreiding@users.noreply.github.com>

cli/schema/cypress.schema.json

@@ -44,6 +44,11 @@
           "default": null,
           "description": "The reporter options used. Supported options depend on the reporter. See https://on.cypress.io/reporters#Reporter-Options"
         },
+        "slowTestThreshold": {
+          "type": "number",
+          "default": 10000,
+          "description": "Slow test threshold in milliseconds. Only affects the visual output of some reporters. For example, the spec reporter will display the test time in yellow if over the threshold. See https://on.cypress.io/configuration#Timeouts"
+        },
         "testFiles": {
           "type": [
             "string",

cli/types/cypress-npm-api.d.ts

@@ -91,6 +91,10 @@ declare namespace CypressCommandLine {
      * Specify mocha reporter options
      */
     reporterOptions: any
+    /**
+     * Slow test threshold in milliseconds. Only affects the visual output of some reporters. For example, the spec reporter will display the test time in yellow if over the threshold.
+     */
+    slowTestThreshold: number
     /**
      * Specify the specs to run
      */

cli/types/cypress.d.ts

@@ -2577,6 +2577,11 @@ declare namespace Cypress {
      * @default "spec"
      */
     reporterOptions: { [key: string]: any }
+    /**
+     * Slow test threshold in milliseconds. Only affects the visual output of some reporters. For example, the spec reporter will display the test time in yellow if over the threshold.
+     * @default 10000
+     */
+    slowTestThreshold: number
     /**
      * Whether Cypress will watch and restart tests on test file changes
      * @default true