feat: terramate ui (#2294)

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## What this PR does / why we need it:

This PR adds a new command `terramate ui`. It improves `scaffold` and
adds workflows for reconfigure and promote. See changelog for details.

## Does this PR introduce a user-facing change?
<!--
If no, just write "no" in the block below.
If yes, please explain the change and update documentation and the
CHANGELOG.md file accordingly.
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```
yes, see changelog
```


<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Large new TUI command plus refactors to scaffold/packaging input
evaluation and manifest types may change behavior of bundle discovery,
defaults/options evaluation, and remote bundle loading. While mostly
CLI-facing, it touches core config evaluation paths used by existing
`scaffold` flows.
> 
> **Overview**
> **Adds a new interactive command, `terramate ui`,** implemented as a
BubbleTea TUI that guides users through *Create*, *Reconfigure*, and
*Promote* workflows and persists changes as bundle instance YAML files.
> 
> Updates existing scaffolding/packaging code to align with the newer
type system and prompt model: local bundle/component discovery now
evaluates metadata during listing, prompt handling moves to
`PromptConfig` (text/multiline/options/multiselect), and input
evaluation paths are refactored to pass `typeschema.EvalContext`
(schemas + eval context) consistently. The manifest model is also
updated to use `manifest.Collection` (instead of `Package`) throughout.
> 
> Bumps version to `0.17.0-rc1` and documents the new `terramate ui`
command and `input.prompt { ... }` syntax in `CHANGELOG.md`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
f39ea6f. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: snakster

CHANGELOG.md

@@ -36,6 +36,25 @@ Given a version number `MAJOR.MINOR.PATCH`, we increment the:
     default = null
   }
   ```
+- Add new command `terramate ui`. This is the successor to `terramate scaffold` with many improvements and new features:
+  - Workflows for Reconfigure and environment Promote with diff viewer.
+  - Staging area to apply multiple changes during the same session.
+  - Custom input forms for all types of the new type system.
+    - Nested forms for objects, including input forms for attributes.
+    - Nested bundle creation.
+  - New `input.prompt{...}` block to deprecate `input.prompt = ...` etc. Example:
+    ```
+    input "multiline_input" {
+      type        = string
+      description = "Description"
+
+      prompt {
+        text = "Required Multiline input"
+        multiline = true
+      }
+    }
+    ```
+    This is supported for inputs and attributes.
 
 ## 0.16.0
 

VERSION

@@ -1 +1 @@
-0.16.1-dev
+0.17.0-rc1

commands/package/create/create.go

@@ -63,12 +63,12 @@ func (s *Spec) Exec(_ context.Context, cli commands.CLI) error {
 	}
 
 	// TODO: Could both be done in a single pass.
-	localBundles, err := config.ListLocalBundleDefinitions(root, project.NewPath("/bundles"))
+	localBundles, err := config.ListLocalBundleDefinitions(root, evalctx, project.NewPath("/bundles"))
 	if err != nil {
 		return err
 	}
 
-	localComponents, err := config.ListLocalComponentDefinitions(root, project.NewPath("/components"))
+	localComponents, err := config.ListLocalComponentDefinitions(root, evalctx, project.NewPath("/components"))
 	if err != nil {
 		return err
 	}
@@ -77,47 +77,37 @@ func (s *Spec) Exec(_ context.Context, cli commands.CLI) error {
 		s.PackageName = s.tryDetectPackageName()
 	}
 
-	pkg := manifest.Package{
+	pkg := manifest.Collection{
 		Name:        s.PackageName,
 		Location:    s.PackageLocation,
 		Description: s.PackageDescription,
 	}
 
 	for _, defEntry := range localBundles {
-		md, err := config.EvalMetadata(root, evalctx, defEntry.Tree, &defEntry.Define.Metadata)
-		if err != nil {
-			return err
-		}
-
 		pkg.Bundles = append(pkg.Bundles, manifest.Bundle{
 			Path:        defEntry.Tree.Dir().String(),
-			Name:        md.Name,
-			Class:       md.Class,
-			Version:     md.Version,
-			Description: md.Description,
+			Name:        defEntry.Metadata.Name,
+			Class:       defEntry.Metadata.Class,
+			Version:     defEntry.Metadata.Version,
+			Description: defEntry.Metadata.Description,
 		})
 	}
 
 	for _, defEntry := range localComponents {
-		md, err := config.EvalMetadata(root, evalctx, defEntry.Tree, &defEntry.Define.Metadata)
-		if err != nil {
-			return err
-		}
-
 		pkg.Components = append(pkg.Components, manifest.Component{
 			Path:        defEntry.Tree.Dir().String(),
-			Name:        md.Name,
-			Class:       md.Class,
-			Version:     md.Version,
-			Description: md.Description,
+			Name:        defEntry.Metadata.Name,
+			Class:       defEntry.Metadata.Class,
+			Version:     defEntry.Metadata.Version,
+			Description: defEntry.Metadata.Description,
 		})
 	}
 
 	if len(pkg.Bundles)+len(pkg.Components) == 0 {
 		return errors.E("no bundles or components found for packaging")
 	}
 
-	pkgs := []*manifest.Package{&pkg}
+	pkgs := []*manifest.Collection{&pkg}
 
 	manifestData, err := json.MarshalIndent(&pkgs, "", "  ")
 	if err != nil {