chore: reproducible pipeline with dev containers (#10305)

# Which Problems Are Solved

- The previous monorepo in monorepo structure for the login app and its
related packages was fragmented, complicated and buggy.
- The process for building and testing the login container was
inconsistent between local development and CI.
- Lack of clear documentation as well as easy and reliable ways for
non-frontend developers to reproduce and fix failing PR checks locally.

# How the Problems Are Solved

- Consolidated the login app and its related npm packages by moving the
main package to `apps/login/apps/login` and merging
`apps/login/packages/integration` and `apps/login/packages/acceptance`
into the main `apps/login` package.
- Migrated from Docker Compose-based test setups to dev container-based
setups, adding support for multiple dev container configurations:
  - `.devcontainer/base`
  - `.devcontainer/turbo-lint-unit`
  - `.devcontainer/turbo-lint-unit-debug`
  - `.devcontainer/login-integration`
  - `.devcontainer/login-integration-debug`
- Added npm scripts to run the new dev container setups, enabling exact
reproduction of GitHub PR checks locally, and updated the pipeline to
use these containers.
- Cleaned up Dockerfiles and docker-bake.hcl files to only build the
production image for the login app.
- Cleaned up compose files to focus on dev environments in dev
containers.
- Updated `CONTRIBUTING.md` with guidance on running and debugging PR
checks locally using the new dev container approach.
- Introduced separate Dockerfiles for the login app to distinguish
between using published client packages and building clients from local
protos.
- Ensured the login container is always built in the pipeline for use in
integration and acceptance tests.
- Updated Makefile and GitHub Actions workflows to use
`--frozen-lockfile` for installing pnpm packages, ensuring reproducible
installs.
- Disabled GitHub release creation by the changeset action.
- Refactored the `/build` directory structure for clarity and
maintainability.
- Added a `clean` command to `docks/package.json`.
- Experimentally added `knip` to the `zitadel-client` package for
improved linting of dependencies and exports.

# Additional Changes

- Fixed Makefile commands for consistency and reliability.
- Improved the structure and clarity of the `/build` directory to
support seamless integration of the login build.
- Enhanced documentation and developer experience for running and
debugging CI checks locally.

# Additional Context

- See updated `CONTRIBUTING.md` for new local development and debugging
instructions.
- These changes are a prerequisite for further improvements to the CI
pipeline and local development workflow.
- Closes #10276

packages/zitadel-client/CHANGELOG.md

@@ -0,0 +1,77 @@
+# @zitadel/client
+
+## 1.2.0
+
+### Minor Changes
+
+- 62ad388: revert CJS support
+
+## 1.1.0
+
+### Minor Changes
+
+- 9692297: add CJS and ESM support
+
+## 1.0.7
+
+### Patch Changes
+
+- Updated dependencies [97b0332]
+  - @zitadel/proto@1.0.4
+
+## 1.0.6
+
+### Patch Changes
+
+- 90fbdd1: use node16/nodenext module resolution
+- Updated dependencies [90fbdd1]
+  - @zitadel/proto@1.0.3
+
+## 1.0.5
+
+### Patch Changes
+
+- 4fa22c0: fix export for grpcweb transport
+
+## 1.0.4
+
+### Patch Changes
+
+- 28dc956: dynamic properties for system token utility
+
+## 1.0.3
+
+### Patch Changes
+
+- ef1c801: add missing client transport utility
+
+## 1.0.2
+
+### Patch Changes
+
+- Updated dependencies
+  - @zitadel/proto@1.0.2
+
+## 1.0.1
+
+### Patch Changes
+
+- README updates
+- Updated dependencies
+  - @zitadel/proto@1.0.1
+
+## 1.0.0
+
+### Major Changes
+
+- 32e1199: Initial Release
+
+### Minor Changes
+
+- f32ab7f: Initial release
+
+### Patch Changes
+
+- Updated dependencies [f32ab7f]
+- Updated dependencies [32e1199]
+  - @zitadel/proto@1.0.0