feat: Add path-based routing for applications (coder#21)

This adds a `path` parameter that specifies whether the URL
provided will be accessed via the wildcard or relative path.

fix: Add "arm" architecture (coder#18)

This allows for 32-bit arm to be used with Coder.

feat: Add app support (coder#17)

This adds what are presently named "devurls" in v1.
It seems this is a dated term, since this allows
much more than accessing applications via URL.

"coder open <name>" will launch any apps defined.
If in the web, it'll open either a web terminal or
port forward to the desired application. If in the terminal,
it'll open the browser, or launch the command over SSH.

feat: Rename "CODER_URL" to "CODER_AGENT_URL" (coder#15)

Users can optionally set "CODER_URL" if they want to force the
CLI to use a specific endpoint, but this should remain optional.

Forcing this to be set disallows users from using a different
Coder deployment inside of their workspace.

feat: Add "dir" option to "coder_agent" (coder#13)

This allows specifying where a shell will be opened
when SSH'ing into a workspace.

build(deps): Bump hashicorp/setup-terraform from 1 to 2 (coder#11)

Bumps [hashicorp/setup-terraform](https://github.com/hashicorp/setup-terraform) from 1 to 2.
- [Release notes](https://github.com/hashicorp/setup-terraform/releases)
- [Changelog](https://github.com/hashicorp/setup-terraform/blob/main/CHANGELOG.md)
- [Commits](hashicorp/setup-terraform@v1...v2)

---
updated-dependencies:
- dependency-name: hashicorp/setup-terraform
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

fix: Update agent script on create and read

The prior behavior led to create not having an agent script.
This ensures it's set on create and update, leaving no room
for an empty state!

feat: Remove agent_script data source to simplify resources (coder#8)

This adds a new resource for associating instance IDs, which will only
need to be used in edge-cases. We'll auto-detect instance identifiers
for the most popular cases, and perform zero-trust authentication.

It seemed weird to separate the agent script and agent itself. This also
led to difficulties previewing the operating system prior to start.

fix: Move "coder_workspace.username" to "coder_workspace.owner" (coder#6

)

feat: Add auth property to coder_agent_script (coder#5)

This enables explicit definition of auth type, so the agent
doesn't misinterpret the running environment.

This also adds "username" and "name" properties to "coder_workspace"
to allow for pretty resource naming inside a cloud.