[IDE] deploy runs invalid setup lookup and --dry-run still updates actions

- [x] I have searched the [issues](https://github.com/apache/openserverless/issues) and believe this is not a duplicate.

### Issue description

\`ops ide deploy\` has two related problems in the IDE deploy workflow:

1. The post-deploy \`setup\` hook always runs \`ops action list setup\`, even when the project has no \`setup\` package. The positional argument is not interpreted as “list actions in the current namespace's setup package”, and the command reports an error for namespace \`default\`.
2. \`ops ide deploy --dry-run\` still executes \`ops package update\` and \`ops action update\`. The flag is parsed and stored, but the deploy implementation never checks it before running mutating commands.

The behavior is present in both:

- [\`apache/openserverless-task:0.9.1\` setup task](https://github.com/apache/openserverless-task/blob/0.9.1/ide/opsfile.yml#L102-L110)
- [\`apache/openserverless-task:0.9.1\` unconditional post-deploy hook](https://github.com/apache/openserverless-task/blob/0.9.1/ide/opsfile.yml#L240-L275)
- [\`apache/openserverless-task:0.9.1\` dry-run state](https://github.com/apache/openserverless-task/blob/0.9.1/ide/deploy/deploy.js#L27-L31)
- [\`apache/openserverless-task:0.9.1\` action update](https://github.com/apache/openserverless-task/blob/0.9.1/ide/deploy/deploy.js#L122-L139)
- \`nuvolaris/bestia:bestia\`, where the same implementation is present. That repository has GitHub Issues disabled.

### Observed behavior

With a valid login and a project that has no local or remote \`setup\` package:

\`\`\`sh
ops ide deploy --dry-run
\`\`\`

The command performs real package/action updates and ends with:

\`\`\`text
ops action list setup
error: Unable to obtain the list of actions for namespace 'default':
The requested resource does not exist.
\`\`\`

The overall deploy still exits with code 0 because the failing command is the first stage of a pipeline whose final \`while\` loop succeeds.

### Expected behavior

- \`--dry-run\` must not update packages, actions, projects, or invoke post-deploy setup actions.
- A project without a \`setup\` package must finish silently without a false error.
- If listing actions genuinely fails, the task should propagate the failure instead of hiding it behind the pipeline.
- Setup actions, when present, should be selected from the authenticated namespace rather than by passing \`setup\` as a namespace argument.

### Minimal reproduction

1. Log in to a valid namespace.
2. Use any OPS project with \`packages/\` but without \`packages/setup/\`.
3. Run:
\`\`\`sh
ops ide deploy --dry-run
\`\`\`
4. Observe real \`package update\` / \`action update\` commands followed by the namespace \`default\` setup error.

### Proposed fix

#### Setup discovery

List actions in the current authenticated namespace and filter fully qualified names for the \`setup\` package, instead of calling \`ops action list setup\`. For example:

\`\`\`sh
setup_prefix="/\${OPSDEV_USERNAME}/setup/"
ops action list |
awk -v prefix="$setup_prefix" 'NR > 1 && index($1, prefix) == 1 { print $1 }'
\`\`\`

Capture the list first so a genuine \`ops action list\` failure is propagated. An empty result should be a successful no-op.

#### Dry-run behavior

- Do not execute the \`setup\` task when \`{{.__dry_run}}\` is true.
- In \`ide/deploy/deploy.js\`, make the execution boundary aware of whether a command is mutating.
- When \`dryRun\` is true, print but do not spawn:
- \`ops package update\`
- \`ops action update\`
- \`ops -wsk project deploy\`
- Local scanning/packaging may continue if desired, but no remote operation should run.

#### Tests

Add coverage that verifies:

- a missing setup package is a silent success;
- setup actions are selected only from the authenticated namespace;
- a listing failure is not masked by a pipeline;
- \`--dry-run\` spawns no remote mutation and skips setup invocation;
- normal deploy behavior remains unchanged.

### Environment

- OPS CLI: \`0.9.1-2607121109.dev\`
- Tested task branches: \`nuvolaris/bestia:bestia\` and \`apache/openserverless-task:0.9.1\`
- OS/architecture: Linux amd64

Start with ide/opsfile.yml lines 102-110 and 240-275 for setup discovery and post-deploy behavior, then read ide/deploy/deploy.js lines 27-31 and 122-139 for dry-run state and action updates. Add or extend tests for missing setup, namespace selection, pipeline failures, and dry-run mutations. Done means absent setup is silent, failures propagate, dry-run performs no remote mutations, and normal deploy remains unchanged.

Written by the indexing model from the issue text.