Disable all actions by `actions = false`

[fiskus]

• Added ui.actions.writeFile for hiding "Create file" and "Edit file" buttons

• Added ui.actions = False to hide all buttons, making catalog "Read-only"

• Strengthen existing tests using toEqual instead toMatchObject and add new

• [x] Unit tests

• [x] Documentation

• [x] Changelog entry (skip if change is not significant to end users, e.g. docs only)

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 20.00000% with 20 lines in your changes missing coverage. Please review.

Project coverage is 37.19%. Comparing base (92cf38f) to head (63a5cd2).

Files	Patch %	Lines
catalog/app/containers/Bucket/Dir.tsx	0.00%	10 Missing :warning:
catalog/app/containers/Bucket/File.js	0.00%	7 Missing and 2 partials :warning:
...app/containers/Bucket/PackageTree/RevisionMenu.tsx	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #4001 +/- ## ========================================== - Coverage 37.19% 37.19% -0.01% ========================================== Files 757 757 Lines 33114 33135 +21 Branches 4676 4683 +7 ========================================== + Hits 12318 12323 +5 - Misses 20154 20168 +14 - Partials 642 644 +2 ``` | [Flag](https://app.codecov.io/gh/quiltdata/quilt/pull/4001/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=quiltdata) | Coverage Δ | | |---|---|---| | [api-python](https://app.codecov.io/gh/quiltdata/quilt/pull/4001/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=quiltdata) | `90.75% <ø> (ø)` | | | [catalog](https://app.codecov.io/gh/quiltdata/quilt/pull/4001/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=quiltdata) | `10.56% <20.00%> (+0.01%)` | :arrow_up: | | [lambda](https://app.codecov.io/gh/quiltdata/quilt/pull/4001/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=quiltdata) | `88.18% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=quiltdata#carryforward-flags-in-the-pull-request-comment) to find out more.

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[fiskus]

Squashed commits