Add bicep jsonrpc command to CLI for programmatic consumption

[anthony-c-martin]

Adds a new cli group bicep jsonrpc to the Bicep CLI. Main goals:

• Provide the ability for consumers to avoid cold startup costs when building many Bicep files in a loop (see notes below about performance)
• Provide an API for other tools to use to with the CLI in a programmatic fashion (similar to the goals of git's --porcelain flag: https://stackoverflow.com/a/6978402)
• Opens up a future possibility for "wrapper" libraries to expose Bicep functionality with minimal logic (e.g. an NPM library - see here for an example)

Closes #11875.

Tested running compilation over 225 .bicep files in the quickstarts repo yields a >100x speed up:

• Running bicep build in a bash loop: 585s
• Using bicep jsonrpc to build the same files and avoid startup costs: 5s

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 7063479311)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 7063479311

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 7063479311"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 7063479311

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 7063479311"

[github-actions]

Test Results

     132 files  ±0       132 suites  ±0   4h 28m 37s ⏱️ + 7m 28s
10 860 tests ±0  10 860 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
52 363 runs  ±0  52 363 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit e9f5225. ± Comparison against base commit 81b4a22.

♻️ This comment has been updated with latest results.

[majastrz]

[majastrz]

This is really nice!