Include Redpanda assets in build artifact

[fabio-miguel]

Fixes #762

This PR includes the redpanda.yaml.hbs file in the build artifact, addressing the issue where it was previously omitted. Non-TypeScript assets are organised into an assets folder in the redpanda module. The module's build script will copy these assets into the build folder.

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[fabio-miguel]

Fixes #790

The previous pull request failed the build due to code expecting to find the files at example: ⁠path.join(__dirname, "redpanda.yaml.hbs”) ⁠, but they were moved to an assets dir, which makes the tests fail. In this PR, location of these files were made consistent for the source files and the build. Therefore, asset files are always in an assets ⁠ dir. This perhaps makes it easier to add more files in future without worrying about build scripts.

Tests were run locally and passed.

[fabio-miguel]

Fixes #790

Apologies...

in the previous commit titled Fix build tests: Update asset paths & restore build script I put the ⁠ assets ⁠ directory in the ⁠ files ⁠ list of the ⁠ package.json ⁠ but this doesn’t affect which files are included in the TS ⁠ build ⁠. Running npm run build -w packages/modules/redpanda would mean the ⁠ build ⁠ directory doesn’t contain any assets. Also, I used path.join(__dirname, "../assets/bootstrap.yaml”). You used path.join to join together different directories in a way which works cross platform. ⁠ My use of ../assets/bootstrap.yaml ⁠ is not a valid path for example on Windows. I have adjusted this to path.join(__dirname, “assets”, “bootstrap.yaml.

Now, I have moved the assets directory to src in the redpanda module, updated paths in redpanda-container.ts, which work cross platform (as you originally intended), and modified the build script in the redpanda module to ensure consistency between source and build files by having the assets directory copied into the build.