Organization sample: environments (Almanac bootstrap port)
* add gitignore file
* data and infra skeletons
* org skeleton
* org environments sample skeleton
* Organization teams sample skeleton.
* Organization env sample GCS for tf state.
* org env: service accounts and GCS roles
* org env: folders
* org env: audit export
* org env: shared project
* org env: switch to released 3.1.0 project module version
* rename organization top-level folder to organization-bootstrap
* org env: use folders module with better outputs, module outputs
* org env: switch the service accounts module to v2.0.0.
* Merge ludo's branch from forked repo (#2)
* org env: update gcs, sa, project modules
* Use correct folder ID in format without prefix
* org env: update folders module version, improve comments
* org env: initial work on README, diagram, add variable for xpn roles
* org env: update roles in README, backend file
* org env: README changes
* org env: README changes
* org env: README changes
* org env: README changes
* org env: add IAM variables for audit and shared projects
* org env: address README TODOs
* org env: minor README changes
* org env: minor README changes
* org env: minor README changes
* org env: simplify the sample's README by moving general considerations into the section README
* Org examples README changes
* org env: simplify initial state management, add comment for shared folder
* org env: change state instructions to copy and rename instead of renaming backend file
* org env: add a section in the README file to explain shared services, and detail options
* fix comment for shared services project
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