Add template function descriptions

plugins/template-function-fs/src/index.ts

@@ -4,6 +4,7 @@ import fs from 'node:fs';
 export const plugin: PluginDefinition = {
   templateFunctions: [{
     name: 'fs.readFile',
+    description: 'Read the contents of a file as utf-8',
     args: [{ title: 'Select File', type: 'file', name: 'path', label: 'File' }],
     async onRender(_ctx: Context, args: CallTemplateFunctionArgs): Promise<string | null> {
       if (!args.values.path) return null;

plugins/template-function-hash/src/index.ts

@@ -6,6 +6,7 @@ const algorithms = ['md5', 'sha1', 'sha256', 'sha512'];
 export const plugin: PluginDefinition = {
   templateFunctions: algorithms.map(algorithm => ({
     name: `hash.${algorithm}`,
+    description: 'Hash a value to its hexidecimal representation',
     args: [
       {
         name: 'input',

plugins/template-function-response/src/index.ts

@@ -33,6 +33,7 @@ export const plugin: PluginDefinition = {
   templateFunctions: [
     {
       name: 'response.header',
+      description: 'Read the value of a response header, by name',
       args: [
         requestArg,
         {