chore: Move httpapi, httpmw, & database into coderd (#568)

* chore: Move httpmw to /coderd directory
httpmw is specific to coderd and should be scoped under coderd

* chore: Move httpapi to /coderd directory
httpapi is specific to coderd and should be scoped under coderd

* chore: Move database  to /coderd directory
database is specific to coderd and should be scoped under coderd

* chore: Update codecov & gitattributes for generated files
* chore: Update Makefile

coderd/database/migrations/000002_projects.up.sql

@@ -0,0 +1,55 @@
+-- Store arbitrary data like project source code or avatars.
+CREATE TABLE files (
+    hash varchar(64) NOT NULL UNIQUE,
+    created_at timestamptz NOT NULL,
+    created_by text NOT NULL,
+    mimetype varchar(64) NOT NULL,
+    data bytea NOT NULL
+);
+
+CREATE TYPE provisioner_type AS ENUM ('echo', 'terraform');
+
+-- Project defines infrastructure that your software project
+-- requires for development.
+CREATE TABLE projects (
+    id uuid NOT NULL UNIQUE,
+    created_at timestamptz NOT NULL,
+    updated_at timestamptz NOT NULL,
+    -- Projects must be scoped to an organization.
+    organization_id text NOT NULL,
+    deleted boolean NOT NULL DEFAULT FALSE,
+    name varchar(64) NOT NULL,
+    provisioner provisioner_type NOT NULL,
+    -- Target's a Project Version to use for Workspaces.
+    -- If a Workspace doesn't match this version, it will be prompted to rebuild.
+    active_version_id uuid NOT NULL,
+    -- Disallow projects to have the same name under
+    -- the same organization.
+    UNIQUE(organization_id, name)
+);
+
+-- Enforces no active projects have the same name.
+CREATE UNIQUE INDEX ON projects (organization_id, name) WHERE deleted = FALSE;
+
+-- Project Versions store historical project data. When a Project Version is imported,
+-- an "import" job is queued to parse parameters. A Project Version
+-- can only be used if the import job succeeds.
+CREATE TABLE project_versions (
+    id uuid NOT NULL UNIQUE,
+    -- This should be indexed.
+    project_id uuid REFERENCES projects (id),
+    organization_id text NOT NULL,
+    created_at timestamptz NOT NULL,
+    updated_at timestamptz NOT NULL,
+    -- Name is generated for ease of differentiation.
+    -- eg. TheCozyRabbit16
+    name varchar(64) NOT NULL,
+    -- Extracted from a README.md on import.
+    -- Maximum of 1MB.
+    description varchar(1048576) NOT NULL,
+    -- The job ID for building the project version.
+    job_id uuid NOT NULL,
+    -- Disallow projects to have the same build name
+    -- multiple times.
+    UNIQUE(project_id, name)
+);